Malicious PDF — malware analysis report

Static analysis result for SHA-256 934b69c8931e5e8d…

MALICIOUS

PDF

37.8 KB Created: 2020-08-06 07:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80a67512532410b064f4326f9b550a89 SHA-1: e7da36194cf42c9eb879f21dcae5eac69ef986b6 SHA-256: 934b69c8931e5e8d3cf7123c474c4ad17bbfea1c5ce89de674fde7c26254fffc
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the same URL, suggesting it is the intended lure. The presence of numerous PDF links, many hosted on Shopify, indicates a tactic to disguise malicious activity within a seemingly legitimate document structure.

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=john+watson+behaviorismo+pdf
    • http://files.bon-ha.de/uploads/1/3/2/6/132680870/1871207.pdf
    • http://files.hoffmanindustries.org/uploads/1/3/1/4/131413678/mubezifuder_wusagafulekane_bexapujukozuz.pdf
    • http://files.myeirestory.com/uploads/1/3/0/9/130969260/6449758.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/molecular_biology_mcq_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/24486956662.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/37472958969.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/87646999457.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/catholic_prayers_in_latin_and_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9256/files/84584984921.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9632/files/sizugisapeminabaniwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/gifofafedinosuxakatuwo.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_off00005601.bin
54c76f865e8caf8aa3230b3c71a21b23208d55148a71d574d9b437525fa3aaee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5601 5528 bytes
font_01_sfnt_off000068b6.bin
bb6b5dba285e48e615d1bd06bc0fed3f299d9074016e04e4fdfd33378d37fe30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B6 9916 bytes

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