Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00ef9b7b553045c…

MALICIOUS

PDF

53.2 KB Created: 2020-08-12 13:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9df2c4a607bb62668fd5f6ed212001d SHA-1: b4f3090ac0b7d5db16cc310f5687dd9b9c6fb693 SHA-256: a00ef9b7b553045ce9f1b376cae1c00709d3a86a8fad4cf616af3deb5e01ed65
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to academic performance questionnaires and includes the malicious URL. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.
  • 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=factors+affecting+students+academic+performance+questionnaire+pdf
    • http://files.light-sup.com/uploads/1/3/2/6/132681002/lolonegesositub.pdf
    • http://files.trebor-ts.com/uploads/1/3/1/8/131871690/4fa93.pdf
    • http://files.sfhenson.com/uploads/1/3/1/4/131437885/danijosisaz_tewowefaj_sefuv_nurarijopurig.pdf
    • http://rusedaboz.frackfreefoothills.net/uploads/1/3/2/6/132682137/ef051fe87e.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/57423440454.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/gukipupudotibete.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7031/files/lisezefijirelubufisole.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/faralasut.pdf
    • https://cdn.shopify.com/s/files/1/0448/9697/7051/files/consumer_reports_blenders.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8657/files/sukeviwizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/lijarerakolajagubepuganu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/59529795471.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/12541240196.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/vasubuvowituvopew.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_off00008652.bin
31d02dd6d554e05f11b6d8ae813e35e8d25b5b4bd9daf9a0454ee52afe5033bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8652 5524 bytes
font_01_sfnt_off000098fe.bin
9be89dd09fd894747c00c4666714d4706f623a847067322a95642423f603ab37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FE 14872 bytes

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