Malicious PDF — malware analysis report

Static analysis result for SHA-256 8847aef4b966403a…

MALICIOUS

PDF

37.4 KB Created: 2020-08-21 07:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13654b9d004838c3886349fc574eccf8 SHA-1: 13125bc0e24e1c9a45dd145433c809eeb74cb0d5 SHA-256: 8847aef4b966403ab0e3774545b68514e143113ba6328120471412956ab3926d
154 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a download for 'Spider man ps4 game link'. This link, https://ttraff.com/pify?keyword=spider+man+ps4+game++link, is identified as a malicious redirector. The document also contains a large number of embedded links to other PDFs, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=spider+man+ps4+game++link
    • http://files.gypsyjacksfashions.net/uploads/1/3/1/3/131380728/vanigikupebaxip.pdf
    • http://files.figscafeandfarmacy.com/uploads/1/3/1/0/131070722/c6f1b91.pdf
    • http://files.bexleyvoice.org.uk/uploads/1/3/0/7/130776343/sufamimosivaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/0452/7514/files/guidepost_solutions_new_york.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/online_converter_with_size_300_kb.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/6532386097.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21511039237.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38743570217.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/84861582852.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/20849905567.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/86970459281.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/ruravor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/ads_b_flight_tracker.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_off00005075.bin
7f6d516b9ca0842964114796f48681925f0f4756f17a6b5400162ca458f6ac36
pdf-font-stream PDF embedded font (sfnt) at offset 0x5075 5536 bytes
font_01_sfnt_off00006330.bin
8c607cc4e244de03a62726134d6ccd124cd6cd420074e74033ac5d9254e2acac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 10872 bytes