Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a361701af71db91…

MALICIOUS

PDF

48.6 KB Created: 2020-08-30 19:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d61471cfcabb20d5fb1dba742644ffc3 SHA-1: a10ce91ffaa4e5b315321212a3d111f261252855 SHA-256: 3a361701af71db91ec0f6b333221d37d3766544ea2fc3ddae335d319f0676edd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix'. This URL is presented within the document body, suggesting a social engineering lure. Additionally, the PDF hosts a large farm of links to other PDFs on Shopify domains, indicating a potential SEO manipulation or content distribution scheme. The ML classifier also 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.cc/wix?keyword=silent+night+find+the+emoji
    • https://cdn.shopify.com/s/files/1/0434/8765/8150/files/ludibefuwobaxedikagaza.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/48553171111.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/honeywell_thermostat_manual_rth230b.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/mckinsey_case_study_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/10225267523.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/15896795790.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/68060095178.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb3a93c1f1a424090ce6f63b8e968f0.pdf
    • https://static.usrfiles.com/ugd/ba3095_d17aec34393346fd81b55d9483dfad24.pdf
    • https://static.usrfiles.com/ugd/b8c837_285ce1ffc2a84235b0ebcf16292b6af7.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/7975943781.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/93960813531.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/army_phonetic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/probability_and_stochastic_processes_3rd_edition_solutions.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_off00008000.bin
fc05648cd9f8bbf505f4893b6cec8b00dfe6e340e6e2bc5745ff1cca984f9dcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8000 5016 bytes
font_01_sfnt_off000090f3.bin
f78afa999d2b3c8ef4e4e0c7b5500137b955ab97f265c8518ea50248200063b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F3 10744 bytes