Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81bfa46d2f7e746…

MALICIOUS

PDF

87.3 KB Created: 2020-09-01 01:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d933503ebc096a57cd4dc107cb51b7f SHA-1: 42d941c7997d7e38c2d82e8733b6ac7d7921691d SHA-256: c81bfa46d2f7e7463e8514d684a406cc68e7f44c0623ebffdcfec21b0948e7b4
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=basara+4+pc+single+link'. Additionally, it exhibits characteristics of an advance-fee scam lure, mentioning lottery/prize language and parcel delivery requirements. The document also functions as a link farm, with 22 external PDF links, many hosted on Shopify. No scripts were extracted, but the presence of a malicious redirector and the advance-fee scam lure strongly suggest a phishing or social engineering attack.

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wix?keyword=basara+4+pc+single+link
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/fivilelimarowonakez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/ranesaxomenavopusilume.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/xopanoxowuforobejogan.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c39ae288aa48338b4977a89dcd2e02.pdf
    • https://cdn.shopify.com/s/files/1/0435/9903/6579/files/14551354037.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/connotation_and_denotation_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0461/7230/7609/files/parulez.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1919/files/namuvigomikujelitagase.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/ways_of_seeing_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/bosejosepuzisivobiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/gelman_bayesian_data_analysis_pdf_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e929.bin
6e9bf3c0ee5d43a449f71e353b2177c5caf6a9cb4ed7ac222dc037a4ff065c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 7192 bytes
font_01_sfnt_off00010175.bin
3c341969a2ea6e87a99f20bf0402c1aa5c988421fc750a0fd376d9c0d3b15191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 5300 bytes
font_02_sfnt_off0001138a.bin
b402f97091250255da6c700f26eed4d55fcd2c3d63a56849eede349192be51ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 8572 bytes
font_03_sfnt_off00012b58.bin
fe94bc4045b4583ea9a7f9b64f8c30700d966057145d58ff32ec034bd58d6fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B58 10668 bytes

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