Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d9afcae290ec02…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 11:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b723812e2a92aeb705d64c6b9c88384 SHA-1: 5cd89e13a6e675bf99a9fc8d773b5ad0d7d99cf9 SHA-256: 79d9afcae290ec022e2c9570910d556f517440165d28de9ef5e3c9e11a6121d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify, but one critical link directs to a known malicious redirector. This suggests a tactic to manipulate search engine results or to distribute malicious content through a link farm. The presence of the malicious redirector URL is the primary indicator of malicious intent.

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.ru/pify?keyword=adam+levine+lost+star++lagu
    • http://detiga.transformyourdogllc.com/uploads/1/3/1/4/131407552/lobonafibukadigus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/research_article_on_child_labour.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/anushka_shetty_photo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/xulufeperivasega.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/43827358660.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/ahuja_speaker_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/28623096090.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/pijodawufaxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/piripodofezezewodifigunil.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/64251844900.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/31855603102.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/koxabitisurobaleruded.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_off00006481.bin
f5509152ec8adba098e89bd0ff43eecc841367abda2d6e8157e1d49b63de989a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 5196 bytes
font_01_sfnt_off00007619.bin
1d90c33f562beb73d3ecb1d3f657299af3b8099d62093f2dc2d5f6ac3815d95e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 10240 bytes