Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12375d26b472083…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 12:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d0681d14ae5a0ae9f3c7b2234e3395 SHA-1: 3aa99581d1d7d4442a6205d38431e2e84a700e95 SHA-256: d12375d26b472083e50acdf20c6a101d64634585c5ee3662aaf908c1686efe5b
152 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 an ADHD medication guide. The document also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.com/pify?keyword=adhd+medication+guide+aacap, which is designed to redirect users to 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.com/pify?keyword=adhd+medication+guide+aacap
    • http://satotozu.mrsbankswebsite.com/uploads/1/3/1/4/131437601/bivaz-wimikipa-dodexaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/wuruzavojexonadubogifebin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3563/1514/files/gotilejoseratipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/sherlock_holmes_short_stories_sir_arthur_conan_doyle.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/komirejubapasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/krizz_kaliko_eyes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/viwarutematidexove.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/25744624700.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/74569412111.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/rudojasazanal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/bunijetupesaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/86918941445.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4496/files/tirefugazaguginis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/76380277827.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/john_stewart_company.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_off000066dc.bin
a9aa033bd522a5b332d92c06ca3c31e7daa2e2a8b518e8fe3d70598810091832
pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 5168 bytes
font_01_sfnt_off00007847.bin
587448247465b529d3edc7e316495182253fa936f4eb3c049d3b2c8f73379050
pdf-font-stream PDF embedded font (sfnt) at offset 0x7847 10264 bytes