Malicious PDF — malware analysis report

Static analysis result for SHA-256 16459ccf2994f5ab…

MALICIOUS

PDF

35.2 KB Created: 2020-08-29 03:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e48e1567d59986c93ddbe1b46831160 SHA-1: 7f287b8c3ba96eb051d425d52f8d55b928539fb7 SHA-256: 16459ccf2994f5abaf1d01a7b58482c4244e6db6beefde46ceb5104fd33687a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to 'ttraff.com', identified as a malicious redirector. This suggests a phishing or scam attempt, likely using the PDF as an attachment in a spearphishing campaign. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=manual+drive+trains+and+axles
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/45600373111.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/bucket_list_template_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/11387187067.pdf
    • https://cdn.shopify.com/s/files/1/0437/9292/4821/files/56988669341.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/dakejimefekulorewubewezas.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e8145f2cca49a898bf42a3af490ec6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a15653272244229a0a2a02fb1223f26.pdf
    • https://static.usrfiles.com/ugd/b8c837_8404108979ec48829d20bde8f35c623c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ea55b7faf6f4a14b06759d01b5ff17b.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/fitness_timetable_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/vavavuwiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/5934/6582/files/neutrino_hypothesis_of_beta_decay.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/kenabuvire.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_off00004d4d.bin
1d860f32efd23c85ef85e7fbf7406a6a64cbcc5846a7608cf242724e906aff1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D4D 4952 bytes
font_01_sfnt_off00005e39.bin
d272c01eb20df5b238ccb38906ee44eefdb41725c71fd34699b8844784e8ef61
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 9956 bytes