Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8f02dc1ebc4d58…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 06:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 108a73783c19510cae359636b9b92159 SHA-1: 0ebf19fa26ca663ab35e6afc5258dd9fcaa0abe7 SHA-256: 0d8f02dc1ebc4d585aa8653bb806599540e0369dcaebd723cf909d5edfc10bea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is known for malicious redirection. The document body is heavily obfuscated and contains a reference to the same malicious URL, suggesting an attempt to disguise the malicious intent. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to potentially distribute malicious content or SEO manipulation.

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=service+management+operations+strate
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/bedford_guide_for_writing_tutors.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/47105916333.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/road_challan_format_in_gst.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/bejofev.pdf
    • https://static.usrfiles.com/ugd/8d57bd_3adf3cf2759e48c5a16fa964da6cc935.pdf
    • https://static.usrfiles.com/ugd/191a6d_c712979813474a7b861fd3e36777c300.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/evaluating_algebraic_expressions_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5592/3878/files/hbs-_750_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/brm_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/ratuzivetemowivutegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/diruludopozojukuwosebuzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7464/0286/files/vevaturepojejipukever.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_off000047f5.bin
7431ff65788ddfeb51ed43b8138e4f083ff2631046b6e8097e6b63eb88eb8aac
pdf-font-stream PDF embedded font (sfnt) at offset 0x47F5 5384 bytes
font_01_sfnt_off00005a34.bin
090be6976b1104532e9341cbc1cc25049b385e7b06773874cca121cd944b9b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A34 9748 bytes