Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a40582b1ac82f6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 16:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c94157036de6546c20c6dc8575160c SHA-1: 485d6d895c99fb93216b9bd01e734f0359f40aff SHA-256: 32a40582b1ac82f639702748bf6abf24b2fecd136f4677d1d8dd872c47c640be
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes the text 'Complete blood count manual method' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=complete+blood+count+manual+method, which is likely used to redirect users to a malicious site or download further payloads.

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/pify?keyword=complete+blood+count+manual+method
    • http://files.azpetscan.com/uploads/1/3/2/6/132683137/depozoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/tufobotilemebimekoloro.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/synonyms_antonyms_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/31169594149.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3768/files/structure_of_animal_and_plant_viruses.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/annuity_immediate.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/sekijelabomuvedipinuzoron.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/58145477108.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/dimemijarajovisafijomom.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_off00006bbd.bin
dca05d4c05421aee5938e0a8c978a25e38a2dcbed31228886deef3c0b769707d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBD 5084 bytes
font_01_sfnt_off00007cd5.bin
47b165dff79134628d08cddf8408791f236fea6a1f472bf2f6ef5b04aa75fee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD5 10316 bytes

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