Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1d92d4fa7c16e5…

MALICIOUS

PDF

52.8 KB Created: 2020-08-12 21:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a41f6d2265c145fd535e4ca5e823e62 SHA-1: a78c6c21b42bcbefda32f5619c9a106c0210020c SHA-256: 1a1d92d4fa7c16e525c40b46978a608d8c51b873cc73ac543902869dfb23ab06
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=fitter%20theory%20questions%20and%20answers%20in%20english%20pdf'. This URL is likely part of a phishing or scam campaign designed to trick users into downloading further malware or visiting malicious sites. The document body, though heavily obfuscated, contains text related to 'fitter theory questions and answers' and the redirector URL, suggesting a lure. The presence of a link farm heuristic further indicates malicious intent.

Heuristics 3

  • 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.
  • 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/wb?keyword=fitter%20theory%20questions%20and%20answers%20in%20english%20pdf
    • http://files.westmorelandchildrenfirst.org/uploads/1/3/2/3/132303068/1512247.pdf
    • http://files.mrobrien.net/uploads/1/3/1/4/131482916/vakok.pdf
    • http://files.jenisonchoirs.org/uploads/1/3/0/9/130969182/xitijigusev.pdf
    • http://files.rabaul-dive-adventures.com/uploads/1/3/0/7/130776041/3350309.pdf
    • http://files.rachaeljanedesigns.com/uploads/1/3/2/6/132680781/6132568.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/8965156765.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/lowes_carbondale_il.pdf
    • https://cdn.shopify.com/s/files/1/0446/6225/9865/files/20621890237.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/barbell_medicine_training_templates.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/adjectives_and_its_types_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/23631983595.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/anti_money_laundering_amendment_act_2020_act_874_ghana.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/car_amp_repair.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/42357489078.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/classic_dungeons_and_dragons.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_off0000821c.bin
672019b219a0c0f24cb6945c9a98252529ed1de27ba312cabfb337133a10f15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821C 5580 bytes
font_01_sfnt_off00009527.bin
a20560066aa8cb88c6415e727036b856eadd5eabc5a6c9d2a548b21b82bcb4ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9527 15808 bytes

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