Malicious PDF — malware analysis report

Static analysis result for SHA-256 52624c2157c737b4…

MALICIOUS

PDF

48.7 KB Created: 2020-08-08 13:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59b19cac856e9a54767715c01062703 SHA-1: f9526897222df21e10b1f6236ec3c7d96b8167f4 SHA-256: 52624c2157c737b42a7802193a69ef2fe69d4c7a11f1c9ef7e8e233fdb6b6e89
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=carnatic+ragas+list+pdf, which is likely used to funnel victims to further malicious content. The document body is heavily obfuscated but contains references to the redirector URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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=carnatic+ragas+list+pdf
    • http://files.projectindianbeauty.com/uploads/1/3/0/8/130874122/bubaserikumazo.pdf
    • http://files.bigelementrecords.com/uploads/1/3/0/7/130738622/lubevapi.pdf
    • http://bigumof.kamiza.com/uploads/1/3/2/7/132710621/pesafop.pdf
    • http://files.olliedudekplaysbass.com/uploads/1/3/2/8/132814303/3653073.pdf
    • https://cdn.shopify.com/s/files/1/0432/7653/3916/files/92502121418.pdf
    • https://cdn.shopify.com/s/files/1/0447/0204/0217/files/book_of_latin_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/31877125618.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/xojesutabexebobegumuravo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/dawepevuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/sabalusuzunuwubiwumik.pdf
    • https://cdn.shopify.com/s/files/1/0438/3057/5266/files/how_to_annoy_your_friends.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/89901548371.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/unity_destroy_component.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/bofesipiriposoboxumosefal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/zokofi.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_off00007ec9.bin
c325be58f06ec1273a6905592dfa88c645e276c5d8b712e19bbefb367986bcc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC9 5228 bytes
font_01_sfnt_off000090a0.bin
756fadddd06d02343af7e09a9860aca4c3d92b1a171338fbabcb4880c64a6ab0
pdf-font-stream PDF embedded font (sfnt) at offset 0x90A0 11728 bytes