Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c55b39e5658980…

MALICIOUS

PDF

60.1 KB Created: 2020-08-08 17:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5dc3c1154367db0b6dc740d7d254bfcf SHA-1: 2026d1ee9aa1864e976c6b90570042298c348fb2 SHA-256: c9c55b39e565898051f68528458b0b10c1cab28e7a2a0533cfdb99de4e0bf039
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=african+union+anthem+lyrics+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to disguise malicious content as legitimate documents. The primary intent appears to be redirecting users to malicious infrastructure.

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.ru/pify?keyword=african+union+anthem+lyrics+pdf In PDF document text
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdfIn PDF document text
    • http://files.lifetimecenter.com/uploads/1/3/0/8/130813851/38a09fe2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/66709168616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4629/5959/files/p90x3_mass_schedule.pdfIn PDF document text
    • http://files.tpak.people.ua.edu/uploads/1/3/1/8/131857479/setokemiwulaxuture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/92823965401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/sibimumuwelizuzukibive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/80945563718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/11900376260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/positive_and_negative_effects_of_economic_globalization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1384/files/daxeguzolosefoviwugenomim.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a891.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA891 24828 bytes
SHA-256: 179fa0d0c4c507ad27bf9e5ee5124e40cb383d600460c9240c1c9be246d2c9be
font_00_sfnt_off00006831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6831 3012 bytes
SHA-256: 1f704321da6c9533394e3daca62f4c9b2d8e087e2f11655debdc550516026f40
font_01_sfnt_off000072f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 5368 bytes
SHA-256: bef3cb1579b8914635a8995be334a477e009dd8bcd4de6faf04dbb513e0031a1
font_02_sfnt_off00008508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 10324 bytes
SHA-256: 5347d3024ed544464580857b7043dfb06e1ab7afa75fd9d2ce48685b241aed88
font_04_sfnt_off0000d4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e