Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee644f49f5e749e…

MALICIOUS

PDF

38.7 KB Created: 2020-08-28 09:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf6d668f7f9554bdc796bf9b6113d92f SHA-1: 06ea7e148b70f046dfcf45ab739cf5849b38de03 SHA-256: 0ee644f49f5e749e94e3150bfe173d4b31a30b833c4911b0e20eebcac1fc34c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution 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.com/pify?keyword=far+cry+5+how+to+grapple
    • http://kibezixon.mzsacredhealing.com/uploads/1/3/1/4/131453872/5855726.pdf
    • http://files.reclaimvitality.net/uploads/1/3/1/0/131071056/4303717.pdf
    • http://metovijox.fenianfear.com/uploads/1/3/2/7/132740708/tinogotasebodofusij.pdf
    • http://pimevu.huntressridingaparel.com/uploads/1/3/0/9/130970004/6f6d59.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/wanisumoxijemek.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/tamil_news_meme_templates.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/retail_trends_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/31288577592.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/begopubalazudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/anesthesia_machine_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/mediwatebev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/18699804323.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_off0000586e.bin
11b51cd7205fc8996a95bd0e85d97c87ffc70c49865538eecbe59f004f426eeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x586E 5292 bytes
font_01_sfnt_off00006a86.bin
46070fc7e59942d53295c92098c2a5e50d34d48fb841dc698504a90fd7ee888e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A86 10472 bytes