Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fed06de00dc9c1f…

MALICIOUS

PDF

137.6 KB Created: 2020-08-10 00:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25712881cb7306cc3b8d4188042b192b SHA-1: baa5261ecbf2de31e644648a8e5498f686eb9b7e SHA-256: 9fed06de00dc9c1f351f97e4fc4f2ffd6432d3c095da320dbb03ed9d4c686aa8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious. The document body also contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=annex+14+free+download+pdf
    • http://videx.tradewinrealestate.net/uploads/1/3/1/4/131437812/a442602e3f356.pdf
    • http://nuzofod.mrshutt.org/uploads/1/3/2/6/132695569/bevulivapuxime.pdf
    • http://vimupulek.rochesterfamilymartialarts.com/uploads/1/3/1/6/131636948/71fb49695ff2.pdf
    • http://jevobi.mrsbhatt.com/uploads/1/3/2/6/132682646/posodirixujowigeveg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/20865639616.pdf
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/arduous_in_a_sentence.pdf
    • https://cdn.shopify.com/s/files/1/0438/8513/3992/files/quantitative_aptitude_questions_with_answers_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/kulomupifuxopikufekul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/14706940843.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/jejubuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/91441585546.pdf
    • https://cdn.shopify.com/s/files/1/0433/7749/2118/files/les_verbes_etre_et_avoir_au_present_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/juturewedumonogipewimif.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/27414681745.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/to_csv_pandas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cb2a.bin
f5b9c4aa92eae47becb195504f3cac3d989e276594fa6ef0862cb9b7d4fb10f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB2A 5148 bytes
font_01_sfnt_off0001dcdf.bin
2c021af3ba35b07661d745ef42753ed43f3a5f5591b0e4fbfb8776ab7a33101c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCDF 12020 bytes
font_02_sfnt_off00020403.bin
116e1aefc1bdc9fdbdc8bc4ca32ed8fc2a9096b6ae60b76e258fcc2d5524df3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20403 16112 bytes

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