Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7185e675387baa…

MALICIOUS

PDF

54.2 KB Created: 2020-09-09 04:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7410e1a2c661c85f0b03dcdde39cead SHA-1: 42b5441498034ee747423531bc9ea0245dcfe364 SHA-256: 2a7185e675387baa188515ac32f6c3d9531d6aee2c5fd1d4d73ce73a4af423cb
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to 'IELTS practice test answers', likely to trick users into clicking the malicious link. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, indicating a potential link farm or distribution mechanism.

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.me/wix?keyword=ielts+practice+test+1+answers
    • https://static.usrfiles.com/ugd/defdb4_8bc8a8898b884c2f9987524bdb4f2303.pdf
    • https://static.usrfiles.com/ugd/92ee2b_6435c979968f4e17ac9fc1d78ed9686d.pdf
    • https://static.usrfiles.com/ugd/6c98bc_339e8f0005e44d2bb4cf0ed95b9c157b.pdf
    • https://static.usrfiles.com/ugd/913720_2db4672160fe492ea1afc22095b31066.pdf
    • https://static.usrfiles.com/ugd/45e30f_88fb6eb780694d17abbbcc3b0afb47cd.pdf
    • https://static.usrfiles.com/ugd/c2007e_07f17aa6a43544499a17f3ce3054d85c.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/45511356167.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/madij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1114/3842/files/plantar_fasciitis_exercise_sheet_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/chhath_puja_geet_2019.pdf
    • https://cdn.shopify.com/s/files/1/0462/2211/4970/files/mayora_indah_annual_report_2012.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/86443981871.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_off00009760.bin
dee599c48d994548c391492bc95282d4ac0fb86a231501178de6ac20fdc4e388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9760 5008 bytes
font_01_sfnt_off0000a88e.bin
8731703b79acb93311d7ce3016b581a24d44cc359630ebfa3d123b127a89218f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA88E 10516 bytes

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