Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e281e15d3f9f8d…

MALICIOUS

PDF

32.3 KB Created: 2020-08-12 06:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4971d3ae8fb80937660d5db08043b2b9 SHA-1: 799c8547d8374d2c9df85518a498520ef3686188 SHA-256: a9e281e15d3f9f8d82464d2e7784d1646f5d5ba4db36c352cc6a6938d9e924c0
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links, with one critical heuristic identifying a link to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains a reference to the same malicious URL. The presence of numerous external PDF links suggests a link farm intended to drive traffic to potentially malicious sites.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.com/pify?keyword=altalink+c8055+manual+pdf
    • http://demeweke.profi-solar.com/uploads/1/3/0/7/130775350/d5b5750.pdf
    • http://zusidiza.whyrunnow.com/uploads/1/3/0/7/130775413/740784085.pdf
    • http://files.whiteroseartstudio.com/uploads/1/3/0/8/130813314/1195778.pdf
    • http://files.aikorobinson.com/uploads/1/3/2/6/132680932/1766606.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3586/files/vitufeweletapotudamotaged.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/voziforiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/knowledge_of_accounting_principles.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/sons_of_anarchy_season_1_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/chamonix_piste_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/active_voice_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0440/9724/1240/files/kotegefokolasodipinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/bawujekaxurilizafuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/english_adjectives_exercises_with_answers.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_off00004281.bin
0a287ad2916bd6ca37645bc386f214fc6251653879ac5689bafdd49430220c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4281 5540 bytes
font_01_sfnt_off00005540.bin
8aa30ab0e80fbf8eda9e663209a2984f18ecdf63cad6791fb21c739394bfd882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5540 9128 bytes

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