Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b15f6a009aefadc…

MALICIOUS

PDF

34.6 KB Created: 2020-08-26 22:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70462b8caa5f8e038792c67fd65cf3c3 SHA-1: a76b7a9a1caa45fea762e961f2075c3154bd2f7e SHA-256: 6b15f6a009aefadc03de45c2b7d743513359307477e06d4ed5ee489abdf2d764
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially garbled, includes the same URL and a seemingly benign Shopify URL, suggesting a lure to a malicious site. 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.com/pify?keyword=frosty+the+snowman+sheet+music+with+lyrics+free
    • http://tozoxene.roseofsharonzimbabwe.com/uploads/1/3/1/3/131398140/seraje_gakoxumedorafa.pdf
    • http://files.swagtalks.com/uploads/1/3/0/8/130813715/174454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/search_inside_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0437/1342/9655/files/22721338302.pdf
    • https://cdn.shopify.com/s/files/1/0448/2210/2178/files/history_of_general_anesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/jexefonoginop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/58196566996.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/hips_don_t_lie_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/xubiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/lemoxorefajuzidu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/cloudflare_dns_ipv6.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/192._168_l_254._254.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/36338396664.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000499a.bin
d984ac29f59c6387bbd74d436e5bcdb87aa9deabcaaa4bf8f545145c1928119a
pdf-font-stream PDF embedded font (sfnt) at offset 0x499A 5272 bytes
font_01_sfnt_off00005b72.bin
3ee9121edc5e23f0c96b4dec676744a54460fab0557256888d9208594fdb4e27
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B72 10008 bytes