Malicious PDF — malware analysis report

Static analysis result for SHA-256 5573f82f327f355f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 15:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4205c57b71dba369ba1414d5bfdfa5b0 SHA-1: 6d180134aefb7f40b7405b4620bd1b94114a06e0 SHA-256: 5573f82f327f355ff53cf1479eb6f4328a22dea3fd09f3092ffa6b975cced716
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used to obscure malicious destinations. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=cara+mia+addio+piano+sheet+music'. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact lure beyond the link farm.

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.com/pify?keyword=cara+mia+addio+piano+sheet+music
    • http://files.bobhopeshowbackstage.com/uploads/1/3/1/0/131070911/241f768.pdf
    • http://files.messiahfamilies.com/uploads/1/3/0/9/130969850/439e0d.pdf
    • http://files.kashimondojo.com/uploads/1/3/2/7/132740399/77f018e3300c34.pdf
    • http://files.mrdougcampbell.com/uploads/1/3/2/7/132740682/7233625.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/youtube_com_activate.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6766/files/digital_marketing_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/lafibefizijurumunuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/67293618389.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/63423060217.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/wijulutil.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/illustrator_smaller_file_size.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/9480473972.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/wisitij.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/27355449684.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/38337861103.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/nozivorutaguzawerebofemi.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_off00005709.bin
a0c97518daa309955a33d654e24ce9cfd427ffeb86b9a056e988bd07544a9a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5709 5184 bytes
font_01_sfnt_off0000687c.bin
4d3d1e28dc84772818d2bfefd8ec833515bd4e5426ae7b125da7595b46a04b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 15536 bytes

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