Malicious PDF — malware analysis report

Static analysis result for SHA-256 106712aa4532518a…

MALICIOUS

PDF

38.3 KB Created: 2020-08-01 12:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de7fdbf78436e7f08ab848c970e2852d SHA-1: 98338363055bf3b09d2f2081f99673f1f6862b9b SHA-256: 106712aa4532518aaa911b6fccde3b2bd249ff44fe8b436e5f4514b73b1d4f42
154 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 ML classifier also flagged the document as malicious. The presence of many links suggests an attempt to drive traffic to potentially harmful sites, possibly for SEO spam 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.com/pify?keyword=john+deere+ct332
    • http://files.nicolettabella.com/uploads/1/3/2/6/132681464/4718648.pdf
    • http://files.lizwhittaker.com/uploads/1/3/1/4/131437249/711e5c15e50.pdf
    • http://files.gracefulbeginnings.ca/uploads/1/3/1/0/131071063/rovawifepipomu_jawizoxivoka_jidemirota_fagoboli.pdf
    • http://files.webberswhippingpost.com/uploads/1/3/2/8/132814448/3757836.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/metal_head_mario_can_move.pdf
    • https://cdn.shopify.com/s/files/1/0431/9130/4343/files/jafudakagamatawex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/witezanovedodililifovexij.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/76246504339.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/kotokurokodasesomudawus.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/zegelet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/71112143845.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8487/files/20528088506.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/48796389718.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4214/files/46010631993.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/sivemabitikirefoxuzod.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/sunirowubisavefokabegos.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/zinadejajizudemojogakabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/80077180151.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/6258693279.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c5d.bin
a111a27fbcdc372e1489240ea2ffe44fa335acb021681a4f9e8dfcb4f4b1cae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5D 4632 bytes
font_01_sfnt_off00005c02.bin
bc1b31bca0d916acb1e23b4f1d5e9336bcc751a4a6bee4480bb5e74c71b43e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C02 9992 bytes
font_02_sfnt_off00007e42.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 4324 bytes

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