Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14002fc15f97327…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 22:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3cbcf25a3eeb4dabccca0d91cba7942 SHA-1: d2368695d2c02758d4cc3943805b48a5a787e2e6 SHA-256: d14002fc15f97327616f79f12c0df38956f50b45cc51912c26abe9f95929cb1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=speak+english+like+an+american+pdf+free'. This URL is embedded within the document body, suggesting a lure to trick users into downloading content. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=speak+english+like+an+american+pdf+free
    • http://files.iamlisteningtoyou.com/uploads/1/3/2/3/132303410/d47a74b24.pdf
    • http://zanof.kyler-leroux-coaching-portfolio.com/uploads/1/3/1/4/131437689/nezifozeminol.pdf
    • http://files.vcgallery.org/uploads/1/3/1/8/131856381/rokererukirejakifu.pdf
    • http://files.playbyplaytheatre.org/uploads/1/3/1/3/131398430/6e6ba694fb.pdf
    • http://noronowu.poseidonwater.com/uploads/1/3/0/8/130814328/5940181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/fallout_4_speed_command.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7816/files/tuzusumajaditojapewezatu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8520/8483/files/discrete_mathematics_and_applications_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/kuxoxutugegovudorigiruva.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/3453955736.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/advanced_sql_queries_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/pedevigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/25961291328.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/63480147661.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/42802070062.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051cf.bin
dcdfc087a21cd676a62e72d679e975098db6e0d8ad42cb9bc9c1cfd8492802fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51CF 5336 bytes
font_01_sfnt_off000063b6.bin
f4ddf91757bd9deb811196fec65255afe6f5e844c6884f288cce5ab673e83612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 13436 bytes
font_02_sfnt_off00008e01.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E01 4324 bytes

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