Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3dd1477916492d…

MALICIOUS

PDF

33.7 KB Created: 2020-08-13 16:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0de233e31a69dc16455d03a741e7c1a4 SHA-1: 7a00af5e96f488bea9f02d98bd1287dee928bfc4 SHA-256: 7e3dd1477916492dfd2fe426d210ef25861becb92c73b9a5740114bcd34ef5d4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=causal+analysis+with+panel+data+pdf', which is likely intended to lead the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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=causal+analysis+with+panel+data+pdf
    • http://files.dynamicwellnesstherapy.com/uploads/1/3/1/8/131871414/6999769.pdf
    • http://files.naturalhealthhealinginstituteusa.com/uploads/1/3/0/7/130738870/naguf.pdf
    • http://feroza.jaysconyers.com/uploads/1/3/1/4/131407815/nazelipop.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/dizenajegikidoruvix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/9374694738.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/beauty_and_the_beast_2020_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/52356449093.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0327/files/catalogo_vimar_plana.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/california_life_science_7th_grade_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/9763540358.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/puper.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/xazopavinajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/37229761586.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/58666948038.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045e2.bin
ae33547c22b6a39052690988e792f92ee5dda77c3919c37257f7bca1d6c66a44
pdf-font-stream PDF embedded font (sfnt) at offset 0x45E2 5132 bytes
font_01_sfnt_off00005771.bin
e7536cacef009dfc3dae1a1e1e4865d4291422cd65b704692d98e9b54f5fe4fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5771 10156 bytes