Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c7656d096b7c08…

MALICIOUS

PDF

40.9 KB Created: 2020-08-19 18:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 931a87201d6e746a8e45d4489b1a8ca1 SHA-1: 2da1172e9111696dc546a0047e8d1539c7ed57c4 SHA-256: 73c7656d096b7c0855588b3bb31e25a55aa5454b42f0354c70eda9d697ab2e28
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to 'Canada food guide meal plan ideas' and embedded URLs, suggesting a phishing or scam lure. The presence of numerous external PDF links further indicates a link farm, likely for SEO poisoning or distributing further malicious content.

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=canada+food+guide+meal+plan+ideas
    • http://files.bouldercrescenthostel.com/uploads/1/3/0/7/130776433/4743591.pdf
    • http://files.ninasestanovic.com/uploads/1/3/1/4/131438113/7688837.pdf
    • http://poladeba.ccs-foundation.org/uploads/1/3/0/8/130874254/316520478d0.pdf
    • http://files.yisonline.com/uploads/1/3/1/4/131438077/5574541.pdf
    • http://files.annegreycollective.com/uploads/1/3/0/9/130969427/4c27f237b1bf333.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/dolenadam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/dugotonevapuvitaliz.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/fekigesiwufejizoteriz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/prepositions_in_english_grammar_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/82306679633.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/3753949493.pdf
    • https://cdn.shopify.com/s/files/1/0435/0813/8150/files/43891858290.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/xelivizutabalananizezob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/7129117134.pdf
    • https://cdn.shopify.com/s/files/1/0431/9209/0784/files/esri_story_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/jajusorizebadi.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_off000063cc.bin
773863efb2514b2e9ac6cfe67ce55f2d3c13654c5dff95de4a0dc040781551fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CC 5168 bytes
font_01_sfnt_off00007557.bin
81ab42fcee63626f3f091d6f628b35c860204f8dad3dd29da02a18ac8a69e53a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 9772 bytes

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