Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa950c04fce3bfe2…

MALICIOUS

PDF

34.6 KB Created: 2020-08-10 13:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56d02b2c62b311b0fc609f53e3865dcf SHA-1: 3eae3f2d270958c01f77057a52806c43e0859844 SHA-256: aa950c04fce3bfe28fdd168dfdcb13659a46ec27f3eb2cf84b2f27b9ea630cf6
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. It also exhibits a PDF link farm behavior, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for downloading a PDF. The primary malicious URL is https://ttraff.ru/pify?keyword=bhagavad+gita+in+tamil+book+pdf.

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.ru/pify?keyword=bhagavad+gita+in+tamil+book+pdf
    • http://files.himleycc.co.uk/uploads/1/3/2/7/132740638/2481082.pdf
    • http://files.wordoflifealaska.com/uploads/1/3/1/4/131437117/b62aa4143b.pdf
    • http://files.placentiatheatre.com/uploads/1/3/2/6/132695586/dfaf0.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0101/files/digavudara.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/93409236293.pdf
    • https://cdn.shopify.com/s/files/1/0436/1197/9939/files/imperative_sentence_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/evangelismo_infantil.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/kizasafalapetuxemuwemij.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/farexajoparuxesoviz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96056065099.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/vabilozeralaguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/bourne_identity_soundtracks.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_off000049b4.bin
66aa56a1ece62ba82785758e954dc85d51a82a1fa0f6decbc9ae7ac8f1617222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B4 5492 bytes
font_01_sfnt_off00005c44.bin
dd86b25929d9d593d19fe64305ffa0c82fda973cc4339cc1e8cb771b62db2c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 9844 bytes

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