Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01599a49a61247f…

MALICIOUS

PDF

49.6 KB Created: 2020-08-21 02:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30779de678ef864fd3753136c73756ff SHA-1: 94334a5382cba75dd51e22ff58809903f7cdf437 SHA-256: b01599a49a61247f801671e882181c69ae104b8af97aae5b662b33f714359ce5
152 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=m+l+a+s+full+form', is identified as a known malicious redirector. The document body contains garbled text and the embedded URLs, suggesting a link farm or redirection attempt rather than legitimate content.

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=m+l+a+s+full+form
    • http://vonodeka.yellowmarigold.com/uploads/1/3/0/7/130775403/3468311.pdf
    • http://files.safehavensavings.org/uploads/1/3/1/3/131379290/lugewuvojofibebuvape.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/basikonupiwum.pdf
    • https://cdn.shopify.com/s/files/1/0440/8439/6184/files/business_plan_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3777/files/tuviji.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/english_grammar_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/guitar_chords_printable.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/wupidefapowipim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/xitisex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/67219777609.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6450/6006/files/lenovo_v110-_15iap_bios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fbe.bin
152745df79bcb96abd95ae5e5661c760346419a3898d02372cb546a2392b0095
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBE 4448 bytes
font_01_sfnt_off00007ecd.bin
e4583b46ca1e0bcd23a1c183693a7d88988f9a0996992cd58b649f6db4a59e56
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 14616 bytes
font_02_sfnt_off0000ac16.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC16 4324 bytes