Malicious PDF — malware analysis report

Static analysis result for SHA-256 b458e4006e773de1…

MALICIOUS

PDF

36.8 KB Created: 2020-08-28 13:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c3f75253d2b7b06e84eb82aed70230 SHA-1: 5426f95b06cf94db495b316c427179e2124762c9 SHA-256: b458e4006e773de1190efbb8f53a2c6ad067e4412b1b881ae42c8e51e465b091
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.com/pify?keyword=instrumentacion+industrial+puerto+rico'. The document body, though heavily obfuscated, contains this same URL, confirming its presence and likely malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=instrumentacion+industrial+puerto+rico
    • http://files.joannegroves.com/uploads/1/3/1/3/131383743/7aabab7cb7fedd.pdf
    • http://files.reehlawfirm.com/uploads/1/3/1/8/131871729/bokaxe_wituja_fovupixevaju_zuzawebe.pdf
    • http://tusawo.selfexposed.co/uploads/1/3/1/1/131164312/mexixudadamoro.pdf
    • http://files.alternativegolf.co.uk/uploads/1/3/2/3/132303189/bexamikelonowen_lisipulozaruvem_xobutisafop.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/89201147785.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/expos_agriculture_biologique.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4431/files/iceland_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/higher_engineering_mathematics_by_bv_ramana_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3330/3976/files/metaphys_duel_links_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/35113686702.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/burp_suite_cookbook_sunny_wear_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/steelhead_fishing_report_idaho.pdf
    • https://cdn.shopify.com/s/files/1/0448/3075/2930/files/bikram_singha_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/walaxarovo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/puzuga.pdf
    • https://cdn.shopify.com/s/files/1/0463/3113/4113/files/android_remove_network_may_be_monitored.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/nonebori.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_off000052d9.bin
dc9bb080c049ed16e77fe7172ea01974aa7543ed3ebdfa229ffaf3cb117586c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x52D9 5156 bytes
font_01_sfnt_off00006439.bin
54cb944501e161474c2decd60e78437140830752ede8c00056aa1e846c310a9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 9920 bytes