Malicious PDF — malware analysis report

Static analysis result for SHA-256 297dfdd1b6130a9b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-23 21:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f3980c5fff5bba3d305dd2e15552577 SHA-1: 0c1fd6da7be828f6152ee569ddc04215f726e637 SHA-256: 297dfdd1b6130a9b1551f5d7b187a2f2d3595291c58faaa7a3664f7c8ab880d4
152 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a redirector service, which in turn points to a link farm of other PDFs. The primary malicious link identified is https://ttraff.com/pify?keyword=2002+cadillac+escalade+service+manual+pdf. This suggests a phishing or scam attempt using SEO-poisoned PDF documents to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=2002+cadillac+escalade+service+manual+pdf
    • http://files.empstoryboards.com/uploads/1/3/1/4/131409909/7351050.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/70019753325.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/29810949015.pdf
    • https://cdn.shopify.com/s/files/1/0440/8488/7702/files/51103533615.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/saragorajoda.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/71424944632.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/integer_max_value.pdf
    • https://cdn.shopify.com/s/files/1/0435/8576/5535/files/8353486248.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/hellboy_comic_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/78691546542.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/dexaroronajepamavegogad.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_off00005920.bin
807c44ce81b225a41d7c5bde223f0ad152c5152dd131204ac449474c8e72e4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5920 5540 bytes
font_01_sfnt_off00006bd1.bin
04d271bf332edef35e65df2ceb715df69ba5712a1d994f779e557426cf1460f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD1 10532 bytes

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