Malicious PDF — malware analysis report

Static analysis result for SHA-256 d627db72bf5c0eec…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 10:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26400110c84fdfd8e5e788950dd06e54 SHA-1: 6bb15a6c5fefd044fdad287b5c1e7c12e9884435 SHA-256: d627db72bf5c0eec989d5782a69bb5da80a421a921ef75a208de8edee519527b
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.com'. This suggests a phishing or scam attempt designed to lead users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=stardew+valley+selling+to+pierre
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/cards_against_humanity_disney.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/56941392932.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/liturgical_vestments.pdf
    • https://static.usrfiles.com/ugd/b8c837_29c6e5411e934a018cb052603a8311d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_56d54847a64f4655a2ec39c63baa34b4.pdf
    • https://static.usrfiles.com/ugd/0d089b_03f49765525d4886bc9d53a90b621888.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/apologetica_catolica.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/96750967279.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/80159411034.pdf
    • https://static.usrfiles.com/ugd/7f16bd_312995b921c2420db6cf424053881271.pdf
    • https://static.usrfiles.com/ugd/c836c3_b36ef76b6c5f445a85eaf4de3a2610d0.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_off0000590a.bin
89ff99946c7c95015407c9f400db679b31c695a8c19de967218c75fda0f2519c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590A 5484 bytes
font_01_sfnt_off00006bd7.bin
5dceee085fae714db4dc33900fdf38ca47d024c20015c763a8e3ec2c4086b2d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD7 10516 bytes

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