Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0646ec7b24b46b…

MALICIOUS

PDF

46.6 KB Created: 2020-10-25 15:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1e808e9d357b07c5530e287c2e3a1120 SHA-1: 948ab93869fb5f8c20056958d2f21069d3adb44b SHA-256: 6a0646ec7b24b46b996f14282c52f107fa15d0f694ae3b096722164639ba6544
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=dehydrated+food+recipes+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f8d2a4c3a958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8a4ce47ba7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5f956d5d49fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f920256d285e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95f1cb9-de1c-4644-8df3-5cafee03d376/wokosanoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69851fcc-1833-43f9-8587-d90aea9d9269/243199867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc605f2-7827-4f3c-93b5-d665d412de94/tatavepepunib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1bd868d-a92d-4257-80af-80b7d6318ecb/vulusugaxawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcf2262-fb51-4c1a-88df-a9da53a20e83/fotaxemafokixunabuduru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8433/6283/files/kewabawinedorujikomigas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9433/9481/files/vepam.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/schma_appareil_digestif.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/libros_de_epidemiologia_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8937/2329/files/android_vnc_server_apk_no_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2407/5936/files/37505676784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6683/3088/files/water_level_controller_using_8051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8364/3065/files/manual_nespresso_krups_essenza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7950/6364/files/63559959903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/altivar_31_inverter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/kiss_the_rain_mp3_wapka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4153/3347/files/peerless_hydrostatic_transmission_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7190/4188/files/44548552354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5477/1623/files/girinajezirefusaxolovoji.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 5312 bytes
SHA-256: a830e487ad05c80008450d0dd15d01b66084d7644bb95da3844ea2fcdad76e5e
font_01_sfnt_off000086aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AA 11324 bytes
SHA-256: 103b6872e070c3241f398ddc7e085244c381db98c442d41cbf2636d679d27d07