Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9b3ac9047b1724…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 20:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2ce5fbb30c5781498cbc22522f2bca0 SHA-1: 570b74b1b80dc1c8a914d7e61c3485436124687a SHA-256: cc9b3ac9047b1724f0c9ff87503c7242eac1d3124e82aad78eb0ab67b19394fb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high density of external links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=swearing+is+good+for+you+pdf+free`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=swearing+is+good+for+you+pdf+free
    • http://muzijafe.balanceandneurologic.com/uploads/1/3/1/4/131438759/71cdf3a76666.pdf
    • http://files.willowwildedges.com/uploads/1/3/1/8/131856443/xukopiwome-tojazelapiz-kasivezobisu-sunezurawuse.pdf
    • http://sevok.mtnstatehoney.com/uploads/1/3/2/6/132695384/xabonozitomi-dutumizu-zuxakukanifuvo.pdf
    • http://vebuzili.seanoneillartist.com/uploads/1/3/1/6/131606490/235f88c19.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/gexubobapipozibojabudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/how_to_annotate_notability.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8118/files/ayurvedic_plants_information_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/92911614180.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/952339627.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/70948077926.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4602/files/life_a_user_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8556/8923/files/57124560145.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/lavotijoduzanurab.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/31877967098.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_off000070d4.bin
08c56fbf6496fff2a7442c6de2e606b74f55339680a09db5bb9c7e030f77c4b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D4 5472 bytes
font_01_sfnt_off000083a5.bin
d9e6a392ef2d4946c58d1225b37b187728a630aa89372492b1fb8175ca71179b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A5 10732 bytes

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