Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afde691ab32facb…

MALICIOUS

PDF

49.8 KB Created: 2020-10-24 23:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a9c75e7c2e7a0c24b3c6475251c8e765 SHA-1: 90bb793d772d6478f58e8f4a4e336ca42f28f2ac SHA-256: 3afde691ab32facb3a7812e81fd103ca763e1ef684ba2e7dd85223f44fd4ba83
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed to manipulate search engine rankings or distribute malicious content. One of the primary links, https://ttraff.cc/aws?keyword=asalem+jarigindante+pdf, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/aws?keyword=asalem+jarigindante+pdf In PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/riwiw.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/buvufax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/wilugugo/baxikisoso.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/kizemegatafabisetibuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/cancer_de_pulmon_metastasico.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/antonia_fraser_mary_queen_of_scots.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/cesky_krumlov_tourist_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6494/0961/files/62259032924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7957/4180/files/medium_in_artwork.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12cb09a8-1004-443d-8f3a-52851f56369a/transformers_prime_bumblebee_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be707f25-fc1c-4656-a248-60a7710c9b61/fitanuwotoguxifibaniviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601edd15-10ef-420c-af47-239c9cae6f1f/lovusadene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1347/0365/files/super_mario_kart_8_deluxe_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/mibeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9207/3376/files/holiday_list_2020_west_bengal.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/breville_bes870xl_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/stokes_theorem_in_physics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A0 5428 bytes
SHA-256: 4993984d6b7a5219553cd18b182d79c222dec7a1472d8e32ee4922b5c3d58dd5
font_01_sfnt_off00005b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B03 28172 bytes
SHA-256: ce46f66c5007e46931f8e5bb141a74044a64622a8d8393341f35e27bb7790e85
font_02_sfnt_off0000986b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986B 9080 bytes
SHA-256: cdb8a51ac81835156d4f9ca30bfdfc12b7ba96ba96701280c7e8c3120956dd39

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