Malicious PDF — malware analysis report

Static analysis result for SHA-256 182747536230597c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-04 00:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20548bde4dc7a96fc3848d21ef5d057f SHA-1: 4ef1f0bf747376d3b31d62cebea8a541a70ad802 SHA-256: 182747536230597c3390c8683ac935431db37d5d97a2dc8fe0718eddf9f89bce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, disguised as a 'Java beginner pdf book', redirects to the malicious URL https://ttraff.ru/pify. This suggests the document's primary purpose is to drive traffic to malicious or spam-related infrastructure. No scripts were extracted, but the embedded links are sufficient evidence 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=java+beginner+pdf+book
    • http://files.6daysmemories.com/uploads/1/3/1/4/131482886/8747419.pdf
    • http://files.mahanoyfootballalumni.com/uploads/1/3/1/4/131406435/5525111.pdf
    • http://files.jackofall3.com/uploads/1/3/1/4/131407406/48700164bc.pdf
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdf
    • http://java67.comIf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/52708883765.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/lejiduvuzirugob.pdf
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/49719147501.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/zipuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/final_fantasy_dawn_of_souls_rom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/73999228768.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4677/files/58669809694.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/tupefevawomale.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/88077086848.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/18640569131.pdf
    • https://cdn.shopify.com/s/files/1/0437/8732/1505/files/93427121095.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/katidafofositijiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/69389839207.pdf
    • http://javarevisited.blogspot.com
    • 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_off00006386.bin
f919e40e77996696ab24082309b6592e5a5ebf26c02198e490c1b1042436b9e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 5252 bytes
font_01_sfnt_off00007581.bin
4224176fe1c9309664f843beedf36f1af1062287b6d72b2d2a1638ad38f1514c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7581 10632 bytes

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