Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cdd50fc2499b6f…

MALICIOUS

PDF

55.1 KB Created: 2020-08-19 17:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92a20b47c2d95d98ff27f720863003fe SHA-1: f728c69fd5143a44809db032b476363c3130d889 SHA-256: 29cdd50fc2499b6f3c12828ae436cb6271d0d25e70ad43c916f948b24a22457d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=ba+computer+science+syllabus+pdf', is designed to lure users by impersonating a syllabus. While no scripts were extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to malicious sites.

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=ba+computer+science+syllabus+pdf
    • http://files.supportingpresence.com.au/uploads/1/3/1/8/131856257/nuzowo.pdf
    • http://repexawub.moveaheadwithkelly.com/uploads/1/3/0/7/130775929/lezobawalopuwimi.pdf
    • http://files.witnesslegend.com/uploads/1/3/0/8/130873979/5907491.pdf
    • https://cdn.shopify.com/s/files/1/0449/0225/2711/files/avalon_hill_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/43439989907.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/prentice_hall_algebra_2_workbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/55487417473.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/wrap_wellness_recovery_action_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/visubiberarob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/gutedaniditirubodosapob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9299/1399/files/10040534882.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/wowebusivugifowapipu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/gonix.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/mofarugiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/duboro.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_off0000976d.bin
76569907446df8c2f216672d18e4e1a5ea902c2e6f026e18733c1bdf315bfcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976D 5592 bytes
font_01_sfnt_off0000aa52.bin
eb5c494fdd1f25ce8563bfa160c455726f35a798753e2a69642340a55ccf26f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA52 11108 bytes

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