Malicious PDF — malware analysis report

Static analysis result for SHA-256 49183e9169636e7a…

MALICIOUS

PDF

67.3 KB Created: 2020-08-14 20:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d81d2f201c9a085d042e2475ae4bab26 SHA-1: 4926c794abd3a66673ff3a2c58ce3f4e352c1252 SHA-256: 49183e9169636e7a4e85eb6588bec8898021a90127136600d3da6377681f850f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to shopify.com, but one critical link directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the same malicious URL and a reference to 'wkhtmltopdf', suggesting it's part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. 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.ru/pify?keyword=sql+convert+date+format+mm%252F+dd%252F+yy
    • http://files.ohmsinkspot.com/uploads/1/3/1/1/131164033/4649995.pdf
    • http://pafine.texasmonkeybusiness.com/uploads/1/3/1/4/131483025/2409324.pdf
    • http://sudejas.hbcatherinewriting.com/uploads/1/3/1/4/131452944/9ecfd57d33bdba3.pdf
    • http://files.inspiredft.com/uploads/1/3/1/4/131405948/4017639.pdf
    • http://gokiw.hestercox.com/uploads/1/3/2/6/132682787/nefixaw-tupetula-nitereleminebik.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/asignatura_estatal_primero_de_secundaria_2020.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/bulave_tujhe_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/36173530569.pdf
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/zipaxizirenumoruf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/34829799597.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/level_285_candy_crush.pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/xutilafalavatu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/98302259794.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/mobutezuvusulozizif.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/bending_moment_and_shear_force_of_beams.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/fimikikek.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/glittering_generalities_examples.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009fd6.bin
1df87ce661b7d863354ca60edb27dbca22e5c076e97db5bea708d941cc36ea78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD6 5416 bytes
font_01_sfnt_off0000b236.bin
496d48e0b43b7b2beb027122de0089645b3ee1381b9b37a55d7ee0caf1a34935		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB236 17344 bytes
font_02_sfnt_off0000e72a.bin
e569fcee42cef602a14ff6a922a1c1b12734286aefc83d56a4c40a740b7bb477		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 16512 bytes

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