Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71c90e97b55bc8c…

MALICIOUS

PDF

39.4 KB Created: 2020-08-05 23:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 427405a10baf2de433fbeff8a76956b2 SHA-1: 596f33c639a84d3b54c59beb6085e4a762b2459c SHA-256: c71c90e97b55bc8ce7bfb37aa088e747c4f40fb640a1764cf8b02d05559f4c0e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a tactic often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=pdf+bestanden+samenvoegen+tot+1+bestand+adobe+reader', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to merging PDF files, suggesting a lure to trick users into clicking the malicious link.

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=pdf+bestanden+samenvoegen+tot+1+bestand+adobe+reader
    • http://files.julesmoderne.com/uploads/1/3/1/4/131438823/812af2d.pdf
    • http://files.mazcan.com/uploads/1/3/0/9/130969689/jenavab_xetonewefum_vegodiniwenu.pdf
    • http://files.openboxm.com/uploads/1/3/0/7/130776368/b482cfa.pdf
    • http://files.andrewsbyreferral.com/uploads/1/3/0/8/130874647/6143474.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibuzos.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/6971735276.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/tuboludaxubikade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugomedimugatusigoxafif.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/cat_287b_specs.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/45951570400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/90386269578.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/import_illustrator_layers_into_after_effects.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/411674922.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_off0000591b.bin
0b44d68c5f0b1311ac8350e59dd46031589e396db2055afdd160033edc855deb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591B 5448 bytes
font_01_sfnt_off00006ba0.bin
37c9c6df03c64dde62395d224efe18c94f45fa2fb206338a68e677e8f15958b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 10572 bytes

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