Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5aedcd0c57b6a6…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 13:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2222056ec39b524772d9eae0733ad278 SHA-1: 21715667367f2c7b447387aeb3b2c10c30247dd6 SHA-256: 8e5aedcd0c57b6a6981011e9c5463b57884975f370d4d49178752c4350487eb4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a manual for a GPS device. The document also hosts a large number of other PDF links, many hosted on Shopify, likely for SEO manipulation or 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/wix?keyword=manual+etrex+35
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/boost_converter_working.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/pafapemop.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/57449514470.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/87062281772.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/texazasevijibenulegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/38101901387.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/sojararavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/zafedunevaxifamavegane.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/free_word_borders_templates.pdf
    • https://static.usrfiles.com/ugd/33c377_cbd9f1e43a5e48f6924901cbff7f380c.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_fbb71db1bb97495faab08b124cc42996.pdf
    • https://static.usrfiles.com/ugd/11f207_89b084b739c94ffca3027f4d64bd038b.pdf
    • https://static.usrfiles.com/ugd/6908d7_c388fae0cfde4e6986c13c0900113477.pdf
    • https://static.usrfiles.com/ugd/9c0842_a4634f46bb70464087fb9a8e8d78e311.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_off00007539.bin
128c17385325baa724cc4e64a8708e378b5328ff54a7908e6930fa4b8fc0e59f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 4864 bytes
font_01_sfnt_off000085df.bin
fa9dfda4eabeae5a1895878674c7525a796ee23e591a2e440431314069271a15
pdf-font-stream PDF embedded font (sfnt) at offset 0x85DF 10636 bytes