Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe45d00e3231cf60…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 08:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7458aed78ff393df6b662d8013584ee SHA-1: 05af092c6300b0ae7f25010fabbd842aea21db82 SHA-256: fe45d00e3231cf609e3d690116e6aea46c2aeb3c08e630d244d78f89a9ce5902
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, which points to 'https://ttraff.cc/pify?keyword=the+budget+savvy+wedding+planner+pdf'. This indicates a phishing or scam attempt, likely to lure users into downloading further malware or providing sensitive information. The document body, though heavily corrupted, contains references to the same malicious URL and benign-looking Shopify links, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for the malicious content. 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.cc/pify?keyword=the+budget+savvy+wedding+planner+pdf
    • http://files.suzannedcorsey.com/uploads/1/3/1/6/131606687/tonusisejebez-zafosif.pdf
    • http://files.nationals2020.com/uploads/1/3/1/4/131483249/698336.pdf
    • http://pibijigu.erinridgeaalhoa.com/uploads/1/3/1/3/131381518/374728.pdf
    • http://files.journeyinvestments.co/uploads/1/3/1/4/131453969/7618256.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/23628682583.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/38665275785.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/2165328124.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/rudens_plauto.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/libro_de_absentismo_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/36104203808.pdf
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/revanivesavememumilupuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/capitalism_and_freedom_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/vurofejurufobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/69204832328.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/nirarakuvasu.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_off0000684d.bin
9982b399207279f11ec6bcab12e5c178c397c45f4e096859e1ef36f197761ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 5644 bytes
font_01_sfnt_off00007b90.bin
e77494575e5ee1897e381c1a2f1c45e25a4f6e695458c83761690f8f31970407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B90 10060 bytes

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