Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cece5517da3a646…

MALICIOUS

PDF

41.7 KB Created: 2020-08-07 05:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f096895da74e4f0d58c92d48ee2f5c5 SHA-1: 04cab82f7439dfa1de2cff0804f763638069dd58 SHA-256: 7cece5517da3a64600e3b66ea285be5dd3cee610301e37d000b76117eae26d28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of external PDF links, indicating a potential link farm or SEO manipulation tactic. While no scripts were extracted, the presence of malicious redirectors and numerous external links suggests an attempt to lure users to malicious content or to manipulate search engine rankings.

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=capacitores+definicion+pdf
    • http://files.brendabronnertv.com/uploads/1/3/0/8/130874058/loguraxazusopumobun.pdf
    • http://files.urbanathenscollective.org/uploads/1/3/0/7/130739239/08df2d383.pdf
    • http://files.jackienorman.com/uploads/1/3/0/7/130776046/napevirixajesed-kadafavorapi-fedezomuter.pdf
    • http://files.hightowerministry.org/uploads/1/3/1/8/131856134/kometepilijoji.pdf
    • http://files.mountofoliveslutheranchurch.com/uploads/1/3/1/4/131406785/b0a6b62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/differentiation_chain_rule_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/endometritis_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/jodujabudijuxelobifinuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/56151147213.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/bulavup.pdf
    • https://cdn.shopify.com/s/files/1/0429/3967/8886/files/fozetuxul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/wavobebodixidalexome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/rowizudinowogiwurilibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/61457887498.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_off000066ff.bin
5b709fc66b355e7f4bad60c5727dddd2d57f6e05be5ced054d1b04f18dae77eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FF 5024 bytes
font_01_sfnt_off00007818.bin
3849178d42f81fe12ad8b28750da94913c6b29463e3e37b05bbbd51dfca7f553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 9768 bytes

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