Malicious PDF — malware analysis report

Static analysis result for SHA-256 1238496e5341046f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-03 21:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37caadbc06b07898fa9a0a423ffde4f2 SHA-1: 25def95d4df5ad953ff425dd5955641e83fa29b0 SHA-256: 1238496e5341046f2e8d5aafd084aabe9fb96f29a6e4f97ada48ed638e8c0055
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious 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/pify?keyword=tatalaksana+bronkiektasis+pdf
    • http://files.mikecurtisfootball.com/uploads/1/3/2/8/132815367/zapitibol.pdf
    • http://gotixuwe.prestigesupport.org/uploads/1/3/0/7/130775219/zovew.pdf
    • http://files.tortoise.com/uploads/1/3/1/1/131163914/8451818.pdf
    • http://files.bbcsalberta.com/uploads/1/3/1/6/131637419/49231.pdf
    • http://files.thebayshorecondos.com/uploads/1/3/2/8/132814930/pigusuvewajarikam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/pack_simulator_fifa_16.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/55479412065.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/gojewefov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/21039970689.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/63945525946.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/34565296067.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/husky_20_gallon_air_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/gupej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/85959702358.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/bolirukixogusejiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/masuxowej.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_off00006f35.bin
b09c26c8f9081ec990db03dfa173aeb8d7eff3668b8f0021906c4bd36fe123d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 5188 bytes
font_01_sfnt_off000080de.bin
ca4851b260f39d2d27c7df1cbcfffbaefefb520d0dfb77f8e3575707cdd58929
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 10324 bytes