Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a724d439ae0753e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-12 15:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7569d13d06c23233566c40a387c240ca SHA-1: 4d8024a88f3e3d132a2bdb15e4e5f9b0452579d5 SHA-256: 0a724d439ae0753ee32b35dbb79165e10ab4b53918f5b1856fefecb651243a5a
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 document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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=os+lusiadas+o+gigante+adamastor+pdf
    • http://parik.nataliedaiseart.com/uploads/1/3/2/8/132815045/wotivozidop.pdf
    • http://files.marcusgorman.com/uploads/1/3/2/6/132681156/renurariranura.pdf
    • http://files.underneathiam.com/uploads/1/3/1/1/131164251/15105c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/pemevesuzegidug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/68511056746.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/matlab_linspace_function.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/manazosejumip.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/77132524120.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/hindu_panchang_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/64422983903.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/tuwugefupoligapazoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73768917897.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/gukawumunutonopep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/21307603690.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9a.bin
2aac1687801eda6db737871bbdfbeb3b4faae18491c799e462c2ba32db7a69da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 5388 bytes
font_01_sfnt_off00007fd6.bin
e61b4736abd51d134efc9993283c3fedd81457d7f0d221c2f33fbb99a1a5b552
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD6 11964 bytes