Malicious PDF — malware analysis report

Static analysis result for SHA-256 9010b895d2a3fffc…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 09:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0952fc6ed0f32c1cabdb6d1723cf1731 SHA-1: 199cc2c3cc1e5a341a9230288d542d28659dc742 SHA-256: 9010b895d2a3fffcc301ca64250135b24d65ecf815ce5dc0f9fe574efd35a3e4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=homework+copy+meme+template', which is likely the primary lure. Additionally, the PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or distribution mechanism.

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=homework+copy+meme+template
    • http://tojufobu.edgeofstyle.net/uploads/1/3/0/7/130739297/774c56aa545.pdf
    • http://files.lansdownewritersworkshop.com/uploads/1/3/2/3/132303181/wokoponagita.pdf
    • http://kaboxo.southabfootball.ca/uploads/1/3/1/3/131381497/6835009.pdf
    • http://bavuli.personalpilatesma.com/uploads/1/3/0/7/130739235/d91eb7bf6b.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/serofukokeza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/41302406432.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/95117579552.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/jadual_caruman_perkeso.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/jidovuti.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/26130936400.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/pibar.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/87842590272.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/embroidery_patterns_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/zularawivux.pdf
    • https://cdn.shopify.com/s/files/1/0447/8589/3542/files/12208940698.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1774/files/can_t_buy_me_love_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/81103816759.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/bully_apk_mod_menu_obb.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_off0000620c.bin
d7ae9495a5d2aa03ff1377b21270e7e48bf5a3e03f438cb8331c5e9c18cbf8e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620C 5120 bytes
font_01_sfnt_off00007371.bin
679206cb12db4864fb74a83489040bfb2374d364d191a2305b8e4d762fd452cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7371 10288 bytes

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