Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a842f65d31fc341…

MALICIOUS

PDF

41.6 KB Created: 2020-08-20 05:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c93a011ddb3564d5d504d619e8997382 SHA-1: c9a239115b2d278f4c63251885cfd8b006333dd2 SHA-256: 2a842f65d31fc3413b2caa9130d309239326ff8861abafedb165aa3296a95d71
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=crystal+reports+designer+versions'. This indicates a social engineering lure, likely attempting to trick users into believing they are downloading legitimate software. The document body also contains this URL, reinforcing the malicious intent. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector is the malicious URL.

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.cc/pify?keyword=crystal+reports+designer+versions
    • http://kosal.soilregenerationgroup.com/uploads/1/3/1/3/131381806/7631241.pdf
    • http://files.themarinewifeandmum.com/uploads/1/3/1/3/131379948/sawejenolulimed.pdf
    • http://files.mybabybooksa.com/uploads/1/3/1/4/131483138/kabonojoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/gilesozakolepulavojononar.pdf
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/41565050357.pdf
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/bonobujudosoxab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/type_of_learning_disability.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/panumuniwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/minion_song_banana.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/64615443329.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/xafexewosuwivonun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/7486999333.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/11936537147.pdf
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/kujafenakigosi.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061af.bin
e23d50c8aca8236e8cf4413de1960adc7095ec4737747fa4c845702a02b475bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 5196 bytes
font_01_sfnt_off00007372.bin
d49fc10c1307224814a35683168fe9cdb0853998f96055a81482fa294e7761a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7372 11704 bytes

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