Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e830ecede02e17…

MALICIOUS

PDF

40.0 KB Created: 2020-08-27 15:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd0f08354676442b89a7ea91f64f1f5 SHA-1: cec1aa2332d68c78bf4ad9c508171120e0982d39 SHA-256: 73e830ecede02e1771d492b8ed279d9d6ed811b5b681bc1c509a77fd9582a339
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a thermostat manual, which is then linked to a malicious URL. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attempt.

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.club/pify?keyword=honeywell+digital+non-programmable+thermostat+manual
    • http://files.catherineccartwright.com/uploads/1/3/1/3/131379830/8215836.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/52619813029.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/lyman_48th_edition_reloading_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/60448740044.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/enlaces_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6613/0593/files/robusobomitumoxiguwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/85773029492.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/12537841243.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/best_annotation_app_for_android_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/2001_toyota_camry_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/5253/7758/files/35815719939.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/70653320754.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/aroldis_chapman_contract.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_off00005b64.bin
ed5c12f9cd57485dce37a3c1baf910325f6aaba58cbfd280f9d3416829eab981
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B64 5700 bytes
font_01_sfnt_off00006eae.bin
a758bf552a7873d6ff8a0e9013f161518862d104f0ab404c69df569e2be5bd90
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 10788 bytes