Malicious PDF — malware analysis report

Static analysis result for SHA-256 77db5a951c8b6f5e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-03 20:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16d35ca79d813799cbca6717c1d768d9 SHA-1: fd77a971dd12ae2b0c76c366632d30e2a7ee0b13 SHA-256: 77db5a951c8b6f5ec8b3b95029c944240035666e1725859cab0be6cddbf31198
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains lures for an advance-fee scam, presenting itself as a government housing scheme form. It embeds numerous links, including a critical redirector to 'ttraff.com', which likely leads to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the advance-fee scam lure. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=pradhan+mantri+awas+yojana+form+gujarat+pdf
    • http://files.lochletter.com/uploads/1/3/1/3/131398366/5027170.pdf
    • http://files.davidson-eng.net/uploads/1/3/0/7/130738921/jobideribuva_dujifibebudej.pdf
    • http://files.inwrought.com/uploads/1/3/1/4/131453198/zelefilagiku_petafal_kazexifojufoz_majumo.pdf
    • http://files.humbletraditionspainting.com/uploads/1/3/1/6/131606818/3112813.pdf
    • http://files.keahisiberianhuskies.com/uploads/1/3/1/0/131070178/9601711.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/gikigewiredopuzoxago.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/dobasusasevozuberarow.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/51689519663.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/wizifadupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/34678054406.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/93196387367.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/bazadetujivazoleza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/kilukek.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/hypoglycemia_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/18025410061.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c60.bin
efdd3a3408380231a7911a6d9d848fa8bfe1b1000e8b118b03a620c67b613ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C60 5696 bytes
font_01_sfnt_off00006fb5.bin
0484ae36c406959286304add9e37810e3ba524ef77de6f4d84d10deebc493ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB5 10420 bytes

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