Malicious PDF — malware analysis report

Static analysis result for SHA-256 12114fb512fd6fa9…

MALICIOUS

PDF

70.7 KB Created: 2020-09-03 09:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6da36da5d529529a045f527fff9953d9 SHA-1: 223d9bfbe8e91f485dabd5908c4cbeba5d4bbf2a SHA-256: 12114fb512fd6fa949f5488c708a70b789f8ea6a47e1f06e09acef3780634969
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.link'. It also exhibits a PDF link farm pattern, with numerous external links, many pointing to Shopify. The presence of a 'Download Button' heuristic suggests a lure to encourage user interaction. While no scripts were extracted, the document's structure and link farm behavior indicate a phishing or redirection attempt, likely to deliver a secondary payload or lead to a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=bengali+language+software+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/genabilazumogapipezupuwid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://static.usrfiles.com/ugd/b8c837_e36fb5fe9e074d02bd5680be6ef6f5ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c72998f81a24045ab070bbb986368ff.pdf
    • https://static.usrfiles.com/ugd/756799_e77613f16f214ca9965920ee44c1a971.pdf
    • https://static.usrfiles.com/ugd/de65f7_4c5bdb754d244baab24eaea82fd37bdb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/ielts_speaking_introduction_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/china_visa_application_form_botswana.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/concussion_treatment_guidelines_cdc.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/8294508802.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/ruzosulozoxadi.pdf
    • https://static.usrfiles.com/ugd/bcc0e4_6ad76c1919054f5a8d568f62a70f37e8.pdf
    • https://static.usrfiles.com/ugd/52b593_7dbc7e3d4b1840989cfe8c62e3be8977.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_cd03a32a676542388341fe24c1cd3476.pdf
    • https://static.usrfiles.com/ugd/b8c837_d72bf1bb1da8404abea58e9d5f721bac.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a700.bin
8bf857b66b2dff911158b256af243829e71f4367aaa191769e2bb9599983ecf7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA700 5076 bytes
font_01_sfnt_off0000b86b.bin
aa59082c5c47e68bdfeb45f80f9e2d914c8c81b857dd2106d09166d81f600054
pdf-font-stream PDF embedded font (sfnt) at offset 0xB86B 10748 bytes
font_02_sfnt_off0000daf0.bin
da1a0f9f5f5155b7a18a322402a002ee38bd7a73338342bcc7f8d5d5e9feba8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 16304 bytes