Malicious PDF — malware analysis report

Static analysis result for SHA-256 7975a5a770425eb1…

MALICIOUS

PDF

43.1 KB Created: 2020-07-28 17:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b8f1067f5a7d236cb36d7541c38322 SHA-1: a2dd525111d88a98244837b75afc91dc838cb949 SHA-256: 7975a5a770425eb1628dbd7515835c878dfe17143b1cd637f6db053cc2fd9554
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ms access database forms' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of a PDF redirector link strongly indicates an attempt to lead the user to malicious infrastructure, likely for further exploitation 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.ru/pify?keyword=ms+access+database+forms
    • http://files.curbsidewithlove.com/uploads/1/3/1/3/131398488/6218630.pdf
    • http://files.tfgministries.org/uploads/1/3/0/8/130873735/getipebebus.pdf
    • http://files.elkgrovelimos.com/uploads/1/3/2/7/132740412/7614292.pdf
    • http://files.tigerscornerdaycare.com/uploads/1/3/0/7/130776775/mepad_jolev_devajuzabidon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/85432287047.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/girizalad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/sodatetuguge.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/garawetamimarigej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/97181880093.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/maresu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/lifulezijejowamameripufe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2430/files/peboporejajepos.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/binofijukezoguvawisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/xojevazokuzinawotopim.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/5393570033.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/wazoniz.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_off00006d1f.bin
47c9d63c8f632afd9bf6357565603ab9de236e7d2ad1f10836fb2dcbe160153f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1F 4916 bytes
font_01_sfnt_off00007dc9.bin
7652a5073b180828787ce3642f11799cef30f7fdeef8a0411cd70b1b3cdae580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC9 9712 bytes

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