Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f5cd57aaafb383…

MALICIOUS

PDF

34.5 KB Created: 2020-10-07 21:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6f15d4420f5da1903957f8ad04813075 SHA-1: 2d99bcba9ff80ffbf0b29a0745027d41198fa7a5 SHA-256: 43f5cd57aaafb3836699f9b027ea5abea36cc4cfcb93771f9815a2c3f7cf0f28
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which point to external PDF files hosted on various domains. One URL, 'https://ttraff.link/pify?keyword=lords+and+castles+offline', is identified as a known malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through a network of linked documents. No scripts were extracted, but the structure and embedded links strongly indicate a malicious intent, likely related to SEO manipulation or phishing.

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.link/pify?keyword=lords+and+castles+offline In PDF document text
    • http://rolez.mfouriephysio.co.za/uploads/1/3/1/3/131378816/3219893.pdfIn PDF document text
    • http://files.sandytoessociety.org/uploads/1/3/0/9/130969206/5284079.pdfIn PDF document text
    • http://xifepabob.meltingtundra.com/uploads/1/3/0/7/130774979/1089222.pdfIn PDF document text
    • http://tinojove.susannahsheffer.com/uploads/1/3/0/8/130873930/ef28dd.pdfIn PDF document text
    • http://files.herdiselmend.com/uploads/1/3/0/9/130969470/dovowadu.pdfIn PDF document text
    • http://files.clinicalsupervisor.org/uploads/1/3/2/6/132681634/jorudaluposidifuwiz.pdfIn PDF document text
    • http://buxefodun.farmtovape.co.uk/uploads/1/3/0/7/130775971/2453976.pdfIn PDF document text
    • http://files.633stclair.com/uploads/1/3/1/0/131070561/1622343.pdfIn PDF document text
    • http://files.escondidofoundationarch.org/uploads/1/3/2/6/132695200/mirop_videmifajizema_welamegade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8863/4790/files/latent_learning_examples_in_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8177/2445/files/fufelasuduxejafilaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/banafuporafujebetiwuzozid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7793/8583/files/baterulibemam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3820/4053/files/magnavox_dvd_player_remote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0993/7045/files/nukimegukowakekixafosiner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5028/9320/files/solamilukakeduve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4944/2715/files/katepuno.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C0 4956 bytes
SHA-256: 2624e8a3a68c52b3841c2ad3c5efd2d7e9351790d5ffdb36515e6b2b025ab98b
font_01_sfnt_off00005aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAC 10080 bytes
SHA-256: b2b6a54d68e6fb4d05d92579dc17accc7b8d82aa37381d192bf9c12bd50d65f5

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