Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ec0d46facfaadc…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 09:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38571d70798dc0a669f8cbcffa2de5d6 SHA-1: 221427191de376a87af4a1cd7dbdbb97c6b5d4c6 SHA-256: 01ec0d46facfaadcdd13c95e41bffc6bf0d8b7d3e6700d0176109e8cb64cdd26
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious redirects. The primary malicious link, https://ttraff.cc/pify?keyword=chemistry+punjab+textbook+for+class+11+pdf, is identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, reinforcing the lure of educational material to mask malicious activity.

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/pify?keyword=chemistry+punjab+textbook+for+class+11+pdf
    • http://files.thebarmyfox.com/uploads/1/3/0/7/130775888/wogumopetanuxix-ribagonisu-mobojadan.pdf
    • http://files.outlandscorgis.com/uploads/1/3/0/7/130738836/5871964.pdf
    • http://files.360defensemartialarts.com/uploads/1/3/1/4/131454620/pejosifix.pdf
    • http://files.qualityfolk.com/uploads/1/3/2/8/132814138/5092812.pdf
    • http://files.wildgroundalabama.org/uploads/1/3/0/7/130738562/lepipemoxizi-tigirujisi-xiwedenuvub-nutinesolipakot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/57636424819.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/medovudapiminexoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/87240146832.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/42152435777.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/davopusosuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/43384082945.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/notuzonox.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/55925252222.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/rifiwivekiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/tobaxexomij.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_off000065ff.bin
23dd0cafcdd5c76a99647bfa2f7f1d15b4314645197ab9dbb8239a42dd93fb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 5800 bytes
font_01_sfnt_off000079a0.bin
094b41b6f36bf26c03a0f76af0e3d4f713e434530d1b9e3a23e1ef202ef41251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 10028 bytes

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