Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbe4900820d5870…

MALICIOUS

PDF

38.7 KB Created: 2020-08-15 10:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d97758e14d5aa0a960939dba29d9d0 SHA-1: 76538621960ec21a32d5144f91eb6dffb00f74ee SHA-256: ddbe4900820d58705cff09a3dc76d32d7812b4762263fefba7462ac703a99275
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common technique for SEO poisoning or redirecting users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=alone+picture+free', is identified as a malicious redirector. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=alone+picture+free
    • http://nipibex.thuspakethezonbi.com/uploads/1/3/2/8/132816202/9be45.pdf
    • http://files.stfrumentius.org/uploads/1/3/2/3/132302940/2274152.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/32515254064.pdf
    • https://cdn.shopify.com/s/files/1/0433/5534/0954/files/anatomie_et_physiologie_de_l_oreille.pdf
    • https://cdn.shopify.com/s/files/1/0432/7204/4697/files/catering_business_plan_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/xapefatilizopekejug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/lovoxeviw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/officium_beatae_mariae_virginis.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/73624064224.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/dojudufevizujepome.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/minecraft_tinker_construct.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/31161993572.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_off000050a2.bin
daf484fd163c30bfc28b4a6703ae11d305ce29a6b6e2ae6f469897b892011d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A2 4608 bytes
font_01_sfnt_off0000605d.bin
f1e3d43b538dabe670caaca03ea6c5295e8cd81e0b2c0a1671ef0cc6c3e08033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 14268 bytes

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