Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eba9300e4b73dc3…

MALICIOUS

PDF

45.2 KB Created: 2020-07-31 15:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e23274ce0ac2cc7aa50486227e582cd SHA-1: 913031d39841681494a0ba2d99959d9185a65e70 SHA-256: 5eba9300e4b73dc37fd84a153bb355e80026d16d5ed6d35122db2e830534c089
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The PDF also hosts a large number of external PDF links, many of which are benign Shopify links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability 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.com/pify?keyword=german+alphabet+song
    • http://files.turningpointclaystudio.com/uploads/1/3/1/4/131483154/6394598.pdf
    • http://files.rvseniors.com/uploads/1/3/1/3/131380083/32611b326d8.pdf
    • http://files.pilar-quintana.net/uploads/1/3/0/7/130775458/xaxoxopi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6534/3138/files/ragirukanuwusovanoluzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24370467333.pdf
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/56332461736.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/zuxaruluvopolapija.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/71975416390.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/43584240175.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/guxuxukujije.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/77174659986.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71482320097.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/fadelega.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/3090174967.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/33925180816.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/rubovidararelonabijuwuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f8.bin
ddff6c17a1b791cf50c0cf5ee024c98d64fca295f408c8eb5e0f0b6ec2aaca4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F8 5144 bytes
font_01_sfnt_off00007937.bin
8085e85f7ab2ec424f2d1e8603e5adaf13eeac0702cda241d6a7218dd8b8c71c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7937 2484 bytes
font_02_sfnt_off000083d9.bin
5e111ab3bca5eecb0eece4bab514769aa2f624622a95428552b61a9e8ece398c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D9 10344 bytes

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