Malicious PDF — malware analysis report

Static analysis result for SHA-256 708f31db509653dd…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 10:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284d02a07d432925fb35f70d53f98ea5 SHA-1: 9559b55647281ae529868b81e14570bcb9655261 SHA-256: 708f31db509653dd63c3c45b6c591abcf8636b3587a999628360133bb80df409
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or SEO poisoning attempt. One of the primary links, 'https://ttraff.club/wix?keyword=the+blues+brothers.+torrent', is flagged as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for phishing or malware distribution.

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.club/wix?keyword=the+blues+brothers.+torrent
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bb13a2_639aa142c29645c08da4608909a46436.pdf
    • https://static.usrfiles.com/ugd/3826db_947d44d953f64163a16b9dd71527dfeb.pdf
    • https://static.usrfiles.com/ugd/225520_02376d8d336a448bbffbfb291b821242.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0434/2179/4460/files/20229520004.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/weight_training_for_dummies_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0904/files/adobe_photoshop_cs2_9._0_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/spinal_cord_lesions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/kawofilekufukogejosenolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/76858877499.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/30932776998.pdf
    • https://static.usrfiles.com/ugd/d1c05f_a282934ec708438e835ac0a59abca035.pdf
    • https://static.usrfiles.com/ugd/a382ee_42b0bd78f7b74b8aa7b2bf538fdecf36.pdf
    • https://static.usrfiles.com/ugd/e8506d_971074e110e04486932a241d6f3186e9.pdf
    • https://static.usrfiles.com/ugd/c7a620_0ad481c5a433439a9f6b1dd5d9d987af.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_off000060b0.bin
22b15015cdcd2d0cb1e46a88b2acc7f77146260e11963a01d0da47abe2966e59
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B0 4684 bytes
font_01_sfnt_off00007097.bin
2408de340eadbd2e805e7566ef8ade86e3e944841d6e8a57faaab2af6b79410b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 10444 bytes