Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fd7ed0640389ca…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 11:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f4345d09e54f081a4246f7e1bcbee3f SHA-1: 179958252337b230dd4296e7b3fd64fb7dff09e9 SHA-256: 71fd7ed0640389cab5e1a76af9215b38c3cf51e20519a7beddc043454dde64d8
154 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to external content, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=the+flavor+bible+ebook+free+download', which is flagged as malicious. The presence of numerous other PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.cc/wix?keyword=the+flavor+bible+ebook+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/64d889_d88db9b478ad493c9a3ad96351e1b4a6.pdf
    • https://static.usrfiles.com/ugd/eaf48f_190acbb82eac498386465b418d22fd8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_76426c93836a446db7be881da02757fc.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/87679971458.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/bojugokiwujasusodop.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/nugiwitisilijurazenedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/431766644.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/34134997559.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/33624461616.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/eagle_eye_headlights.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/3629031244.pdf
    • https://cdn.shopify.com/s/files/1/0457/7401/2582/files/elementary_statistics_a_step_by_step_approach_8th_edition.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_off000061d7.bin
abefc6c105677bbf7e21573505ad5fe87a12f3acc1e124f8b5b6a3f71cd8271b
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D7 5124 bytes
font_01_sfnt_off00007357.bin
90dce06debcb496a2fadff21face7ce1235524520c98a9cae97e151fc385ff84
pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 10128 bytes