Malicious PDF — malware analysis report

Static analysis result for SHA-256 83508aa3ec2ec1ec…

MALICIOUS

PDF

39.1 KB Created: 2020-08-08 10:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeca1525d881532cfa9fb4bce108d026 SHA-1: d80db8bb715f5541f8e9acddbe485337820c18c2 SHA-256: 83508aa3ec2ec1ec905187efdf167fbc9a63c0a429b0d4d8c4671b02e46e9608
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=electrocardiograma+normal+interpretacion+pdf'. This indicates the document is designed to lure users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains but likely serving as a distraction or part of a broader SEO poisoning scheme. 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.ru/pify?keyword=electrocardiograma+normal+interpretacion+pdf
    • http://files.yogatheartofwellbeing.com/uploads/1/3/1/4/131453215/266025.pdf
    • http://files.uccstj.com/uploads/1/3/1/4/131437671/gutuzulobab.pdf
    • http://files.nikkirichastrology.com/uploads/1/3/0/7/130738825/4946832.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/iodine_value_of_fats_and_oils.pdf
    • https://cdn.shopify.com/s/files/1/0439/2642/1672/files/wobazafoliluvojulexavupuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/96583850887.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/dinidadelubilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8238/files/walking_dead_s07e14_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/putazoxare.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/que_es_la_l_carnitina.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/tivajirutobepumapa.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_off00005be2.bin
857294f0353333eedcc6f9da1db3785ed0e03042327bfd690d2cb3678ed4abea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE2 5252 bytes
font_01_sfnt_off00006db1.bin
d169e9ff8280d4b85ce949caf058f8036d0ee66eac8c50400ae470397a6f28b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB1 9900 bytes

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