Malicious PDF — malware analysis report

Static analysis result for SHA-256 749ab1e9ea8b64f6…

MALICIOUS

PDF

107.7 KB Created: 2020-07-10 05:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 278e7b6195af9bedb89982e6b09d3267 SHA-1: d03a3f46021d48b3f3b1f6906a09e88df967b55d SHA-256: 749ab1e9ea8b64f6aeeb8a1f6ce87f77b34766fa60a371b37989c4e75b5b8347
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to lotteries, prizes, and parcel delivery, strongly indicating an advance-fee scam lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=bourbaki%20topology%20pdf
    • http://files.basevillageforgifted.com/uploads/1/3/1/1/131164272/2582109.pdf
    • http://files.seeingsouthern.com/uploads/1/3/1/8/131871994/620f0504947.pdf
    • http://files.evelandfarm.com/uploads/1/3/1/4/131436971/93088aafe1eb3.pdf
    • http://files.hbcindy.com/uploads/1/3/1/8/131856041/sisema-sokeri-rodirupijef-veguxuvagobufi.pdf
    • http://files.romemta.com/uploads/1/3/2/8/132815175/guzulugizoxupilaruz.pdf
    • http://files.thevisualnarrative.com/uploads/1/3/1/4/131407086/5196340.pdf
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdf
    • http://files.kevinkilroy.org/uploads/1/3/0/8/130814387/bamomu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://rakelogexexo.files.wordpress.com/2020/07/38594717366.pdf
    • https://wexozixa.files.wordpress.com/2020/06/mimadizuwotadu.pdf
    • https://xidiseso.files.wordpress.com/2020/07/monasowu.pdf
    • https://siwelapow.files.wordpress.com/2020/06/6009922680.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mituvazejuremoposanizama.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000155e8.bin
70ee0905138482beff804226145f2d35625a06a1516a0150eb1f6582f50f7b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155E8 5044 bytes
font_01_sfnt_off00016730.bin
2279fcd8a6a93f980c19c141f27c9db70c13f0f57c0ba8546412f5d12bf56c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16730 10356 bytes
font_02_sfnt_off00018afa.bin
7d14909007edf92020360fef6c45d1f477ac83cd02861a5dbb39b061674b8805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AFA 16376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.