Malicious PDF — malware analysis report

Static analysis result for SHA-256 27182e639b355c63…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 12:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1917bff513dc6db9c99f3ee1718dd677 SHA-1: 0b7ac45570be0b683fc54bb8ab9879cf104eee5f SHA-256: 27182e639b355c637325d296561407249a8272a3bc618ed89947a17a31405750
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'irregular yo verbs worksheet', which is likely a pretext to encourage clicking the malicious link. The presence of a callback phishing lure heuristic further supports the malicious intent, aiming to trick users into contacting a fraudulent support line or engaging with a scam.

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.
  • 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
  • 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=irregular+yo+verbs+worksheet
    • http://fopazif.titansinvite.com/uploads/1/3/0/7/130776255/ramiwuzaju_tirotuz.pdf
    • http://ravifixi.bearsreg.com/uploads/1/3/0/7/130776167/nedotu_nutugimuzisav_tawefogadulotiv_zelobukas.pdf
    • https://cdn.shopify.com/s/files/1/0436/8056/3350/files/17071166212.pdf
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/summary_writing_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/joxiser.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/pdf_pendidikan_agama_islam_kelas_10_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/52834826549.pdf
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/33192864495.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/rerumanodubamore.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/mitosis_in_onion_root_tip_cells_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/52784384151.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/87503024044.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/rodilofiwufijipujoxuzon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/retilelefuleseki.pdf
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/the_choice_for_love_barbara_de_angelis.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_off00005bc5.bin
23e771e473f6cb452dc8ef07ff354494600b4efb91d26c4ad170435d8e13eda8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC5 5340 bytes
font_01_sfnt_off00006e01.bin
b83e8d309f9b34bd89eafee414a8ba53f9e2c4eeca1ba47272a2a87cc42252b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 9880 bytes