Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfcf41cf6bf8f81…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 13:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3a1638606d191306d1cd05bbe4179d SHA-1: 67625b0f01b8b88478ad958ada00dc4dc6165897 SHA-256: 1cfcf41cf6bf8f81bcce8bdc86e29c56677f449115cdaaa7c8603e9a2a84deb7
148 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'aptitude test questions and answers for deloitte' and includes a critical heuristic firing for a malicious redirector link. It also contains a link farm pointing to various PDF files, some hosted on Shopify. The document body text, though partially corrupted, reinforces the lure and contains the primary malicious URL. The presence of a download button lure and a callback lure suggests a social engineering approach to trick the user into further interaction.

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aptitude+test+questions+and+answers+for+deloitte
    • http://nakidakuz.arttherapysantafe.com/uploads/1/3/1/0/131070109/lukamovoz.pdf
    • http://files.dandelionsanddaisiesfiberarts.com/uploads/1/3/0/8/130873930/xujuputofirivom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/vaxuxalikadolupoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/37905494203.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/new_songs_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/heteroside_cardiotonique.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/fabafusero.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/5e_critical_hit_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/woluregi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/67606082463.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/18996605144.pdf
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/wofakuviwajemifupajazikof.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/devore_probability_and_statistics_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/wapezupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/72811111861.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_off00006267.bin
2711e74ce09ae869d081d54d22c8d21185e8aa9a27afee7c7905bb6cf0567cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 5240 bytes
font_01_sfnt_off00007456.bin
01db8987d16ce127bc263203a3beb898512205210d4af06a141ae99b7ea79c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 10508 bytes