Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ba43480d250a5e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-24 03:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f10d3759d962b5b01adea3ec2c52f44a SHA-1: 207912fabcff9aa4984d3256cd8a59aede4d9d18 SHA-256: 92ba43480d250a5e6a110559324087dcac09b03261f35ca0b08ddb0255eba3c0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=html+comment+box+template'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. 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=html+comment+box+template
    • http://files.southwickchurch.com/uploads/1/3/1/6/131636807/fea3dda59857b61.pdf
    • http://files.oversealgala.org/uploads/1/3/1/4/131437418/vinepudokige-vezonimufaxe-febop-xenar.pdf
    • http://jexaken.djindyproductions.com/uploads/1/3/2/8/132814838/jowifurugitizo_xafezukas.pdf
    • http://files.virginiarlca.org/uploads/1/3/1/4/131406977/xikunenusodakaj.pdf
    • http://files.jexofde.com/uploads/1/3/2/6/132682976/75f8deb51dc03cd.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/97209142678.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/psychiatric_nursing_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/1129716875.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/baixar_livro_carry_on.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/9640412781.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/bolatozijutegirenap.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/wuroginopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/koreravejevorijupogagomuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/1537/9866/files/celerio_zxi_manual_interior.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/76925930112.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/49587456063.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_off00006877.bin
bccdbe9304c214b95568c56eaa7995cae77f85c5634e4b2f6bfbcfd6154debf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 4972 bytes
font_01_sfnt_off00007946.bin
902a3fc4ccb9a6840fec59ed5534987dc50ae9f6012e7df96862cebac36f28f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7946 15940 bytes

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