Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0cb953725e70554…

MALICIOUS

PDF

37.1 KB Created: 2020-08-10 17:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e14272578ffdb2bb34edd918faaecde SHA-1: 3e64a2d83519092ea4d7182cd8f2f87647711411 SHA-256: a0cb953725e7055461564e3f72b8de37d426f29099ecb97353f0fe1173dcfa30
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=capitalization+worksheets+1st+grade+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The document also contains a PDF link farm heuristic, suggesting it's part of a larger SEO poisoning or link farm operation. No scripts were extracted, but the embedded URLs are the primary indicators of 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.ru/pify?keyword=capitalization+worksheets+1st+grade+pdf
    • http://namaxukag.campaignchurchofchrist.org/uploads/1/3/1/3/131380600/8b79869.pdf
    • http://files.mandakemp.com/uploads/1/3/1/3/131384777/8881296.pdf
    • http://faguf.mydeckstairity.com/uploads/1/3/1/6/131606490/mobojojoli.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/72841123494.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/kifuzafobakinavafunokofaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4591/0678/files/60366237036.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibuzos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/python_square_a_number.pdf
    • https://cdn.shopify.com/s/files/1/0450/4377/7694/files/capteur_ultrason_hc_sr04_arduino.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/81141603002.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8074/files/7664965853.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/vivemusakewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/herman_bavinck_reformed_dogmatics.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_off000051ea.bin
bb6111329d91367e3efd867f95bbda796ca0619ad0490a5bce4fd6dce57e3245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51EA 5468 bytes
font_01_sfnt_off0000649c.bin
99ee847c931bb7aac272c9f7aaafc3009abff4296e06857056d9dedbd9e9ff17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 10292 bytes

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