Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fd9e72db018f58…

MALICIOUS

PDF

44.5 KB Created: 2020-07-30 02:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a214095fe99064c2797d7979732d68f2 SHA-1: fdf3988d3ada729e30c506b770f30b14888791f3 SHA-256: 69fd9e72db018f58e30f6ac2632ae96e5bde0b4a38a7d657d8388b9b39c7c332
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The 'SE_INVOICE_LURE' heuristic further supports the phishing pretext of payment-related content. No scripts were extracted, but the presence of malicious links is a strong indicator of a phishing attack.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=online+payment+system+pdf
    • http://files.maplewoodcommunitymusic.org/uploads/1/3/1/6/131606289/kuzikulena_suluret.pdf
    • http://files.vincentsgermanshepherds.com/uploads/1/3/1/4/131437584/jegesafukukukadolugo.pdf
    • http://files.valeswooddaynursery.net/uploads/1/3/2/6/132681153/durularesig-viduvinubupopuk.pdf
    • http://files.madisoncountymilkbottles.com/uploads/1/3/0/7/130776745/kavez_gelonibukom.pdf
    • http://files.jaybauman.com/uploads/1/3/2/6/132681587/6107540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/wijoxidamufeweperoliloben.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/48881572136.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/12916838964.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/fadeluw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5803/6889/files/jesezevabugifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/wuborapasoratul.pdf
    • https://cdn.shopify.com/s/files/1/0429/6130/5756/files/11056749240.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/laluvojede.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/xiwuxexaretuxoke.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/mejisatebiwilemojuteful.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/nuvasigedumagera.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/xubirizasinazalufozu.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_off0000718e.bin
f7d97918f1944eaea6c4762353d3d8846b5f30e0b0ea17a8f16598af43c2713f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 4896 bytes
font_01_sfnt_off00008225.bin
6617d971bfd4c5173d2ff63f101ac3616846ca5fa31bd4c7dc5b08dc96fee8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8225 10152 bytes

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