Malicious PDF — malware analysis report

Static analysis result for SHA-256 088081b68864e1da…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 16:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18be16c86f76ad1934328e40a31e28c6 SHA-1: 4b996150644efe7ced82ff85f0717a7c93bf0bfd SHA-256: 088081b68864e1dafa4c7f454be137f4d368eb790833382e79b7687cd56f4471
174 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination and potentially deliver a payload. The document body, though partially corrupted, contains text related to a 'feeding guide' and includes the malicious URL, suggesting a lure. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm strategy, possibly for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=similac+total+comfort+2+feeding+guide
    • http://files.therealmcdenver.com/uploads/1/3/2/6/132682882/f7a0013d13.pdf
    • http://files.dixiedaisies.shop/uploads/1/3/0/7/130739415/vuxigugupuwim.pdf
    • http://files.lajkonikchicago.us/uploads/1/3/2/6/132680853/rebejufataragowen.pdf
    • http://lerefo.educatorsltc.com/uploads/1/3/1/4/131482933/5681828.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/1663/1973/files/anemia_hemolitica_en_el_recien_nacido.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/9312457083.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/woruxiponibanel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/how_to_cancel_directv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/40277578096.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/adjective_list_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/xitarenevepiwogudogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/nevebunelivevatudokid.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/53654483936.pdf
    • https://cdn.shopify.com/s/files/1/0446/5560/7971/files/75195761135.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_off00006714.bin
0d4bf0a3bbc8b4a6f9966cd4974023a7a14e4a215e6c7e841739f07fab8116c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 5396 bytes
font_01_sfnt_off00007948.bin
f831118a62b7c2d5b44f7805fa27fec5c5a38f356a5c8df53b4656cc8cd7595d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7948 10672 bytes

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