Malicious PDF — malware analysis report

Static analysis result for SHA-256 4231b8c6f2fe0275…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 01:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bc628f1c2ea8e3b0e48a1bc37274746 SHA-1: f631759ba2b87c00fe43a07257f8dc90fef0575b SHA-256: 4231b8c6f2fe0275be132b34f8e28a90ded1a48fb72a7802a9bca5d7ee68181a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=kebutuhan+dasar+manusia+dalam+keperawatan+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external malicious content. No scripts were extracted, and the PDF structure itself is the primary vector for the attack.

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.com/pify?keyword=kebutuhan+dasar+manusia+dalam+keperawatan+pdf
    • http://temobo.steubenvillenutcrackervillage.com/uploads/1/3/2/8/132814930/350128124.pdf
    • http://sesivux.kingfisher-strategy.com/uploads/1/3/2/3/132302868/9874854.pdf
    • http://napel.vannestcounseling.com/uploads/1/3/2/8/132814930/8290454.pdf
    • http://files.zestenergy.net/uploads/1/3/1/3/131383383/1560563.pdf
    • http://buvexole.hometechrenovations.ca/uploads/1/3/0/8/130874426/vidaposaxip-lobuvor-tasatak.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/briggs_stratton_exl8000_generator_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/new_bhajan_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/55902235299.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0431/7256/1050/files/18971027626.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/air_cooled_chiller.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/cowgirl_twist_line_dance_step_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/24815529624.pdf
    • https://cdn.shopify.com/s/files/1/0462/8588/1505/files/android_messenger_failed.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/aicpa_ethics_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/reliability_centred_maintenance_john_moubray.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/88564712655.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_off00005f61.bin
f6ba688782304369c6cc7a26be4b96d910a1064c241e6204b7267326c061c97e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F61 5548 bytes
font_01_sfnt_off0000721e.bin
a9f019495a560d6fdd92bec395b55606c890e65c768a1dcb08b3a770108b1e72
pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 9900 bytes