Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cd0f22be53b3f0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-17 04:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4869b2d87b84f19d00d897c9214b6a1 SHA-1: c9a2c126c45bbe54a69aaa7103d1de478003e2e4 SHA-256: 77cd0f22be53b3f0c5d9faffe7f41393922ee4b3d06466c10fb165c36aedb0b9
152 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to a 'punjabi song status' and the malicious URL. The presence of numerous other links to Shopify domains suggests a link farm for SEO manipulation, likely to obscure the malicious redirector. No scripts were extracted, and the primary malicious activity appears to be the redirection to the ttraff.com domain.

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.com/pify?keyword=bebe+bapu+punjabi+song+status
    • http://files.lily-warner.com/uploads/1/3/0/8/130874524/e22cdaf2.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/55464641865.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/wuludebavukevavasij.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/79565945203.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/68674823488.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/40410453709.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/62599432531.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/72451442608.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/7443281486.pdf
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/sobugalabuxivixepid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/88616697859.pdf
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/43260759829.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/29916687134.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_off00004983.bin
6e7c34557751bcd37babff7a7d03482b8167695e2d6bfcd81c18bc39250b05d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4983 5124 bytes
font_01_sfnt_off00005b08.bin
b69f198b4c615a76721a861a2632ccbf4e620b0da4ce104fd1c6323a554fe122
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B08 5092 bytes
font_02_sfnt_off00006de6.bin
64462dbbedbe5085d07f8cffda7f87835740a932ec6a47898c380a48859399f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 13720 bytes