Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a6ae896cd61a8b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-08 11:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29310b4e52f2234da3ce5987b1012d09 SHA-1: 1c933b01cf072616939751ecaf865a9d2afea62a SHA-256: 97a6ae896cd61a8b654ff2b35004ae1c5fa0b44eea5d9052f1b37634dbc4c5f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate resources. One critical heuristic identified a link to a known malicious redirector: https://ttraff.cc/pify?keyword=blank+coordinate+plane+worksheet+pdf. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=blank+coordinate+plane+worksheet+pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.saintcharlespto.com/uploads/1/3/2/7/132740756/400780.pdf
    • http://lafajuk.jdweddings.com/uploads/1/3/0/8/130873995/8072121.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/rarupapeme.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/soda_keygen.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/17703522588.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gopamulirusakipibav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/poragasojuxadazori.pdf
    • https://cdn.shopify.com/s/files/1/0437/5868/2273/files/rowukefilerod.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/rinetokipid.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/30393562621.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/62158995475.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/49865945858.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5810/files/kibuweniviwike.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/strength_training_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/psicologia_diccionario.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/383037583.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006296.bin
beaab7fe88eacda3bdcfef8200c72e7e71499634e76560c38d7b399f656f622f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 5448 bytes
font_01_sfnt_off0000752f.bin
cda094f3e1f23df3caef7313bd53ceec9390e335190135fe297f8ded55f9f16e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 10112 bytes

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