Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cdc0f2afc136f6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-01 19:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b6cc8fb7f891137e65940ffc057a67 SHA-1: ea784a370d53e750a0a58ea68ba72ab53ee6ba8d SHA-256: f3cdc0f2afc136f6e98a4a8a91b630cced124e82faea49aaf36653cc4c4f2199
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=compact+presario+f700', which is designed to lead users to potentially harmful websites. The document body, though heavily obfuscated, contains references to product names and URLs, suggesting a lure for users interested in specific products. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=compact+presario+f700
    • http://files.mountainedgeresort.com/uploads/1/3/0/7/130775679/zafewidaxujilakur.pdf
    • http://files.semisrc.org/uploads/1/3/1/4/131454106/tuvabim-sujizinoj.pdf
    • http://files.mimedesignstudio.com/uploads/1/3/2/6/132681826/38ee6e314dfd.pdf
    • http://files.jenisonchoirs.org/uploads/1/3/0/9/130969206/7471780.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/zumemajokexoge.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/37734997051.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/lopetowuzajepom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/96699267166.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/fodagigogewufevifep.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/gogowevelegowifagib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevesuladufutaniwor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/xeparinu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/68597357900.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/titexategulolutedobaxojuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/71747320127.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/nomutelaramuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/51533486229.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_off00005b39.bin
0957861d07309e568adcabdf4feb0451a0b4c0a1d7dd7d013f80735e77628ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39 5256 bytes
font_01_sfnt_off00006d03.bin
5cf130d21a01425221fe9a80911fc17b6c7d7eaa392e49f164477eb4bf1b5ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D03 13464 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.