Malicious PDF — malware analysis report

Static analysis result for SHA-256 4620fcc8334d0197…

MALICIOUS

PDF

46.0 KB Created: 2020-08-23 08:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10ef9b0e5286e05763c632f2f82c9b81 SHA-1: 7c2a19c7d8013b8e4bd8d7f5a6b57ddf75d5ea41 SHA-256: 4620fcc8334d0197ed3ab50ee8e5bf17314c7995bf874360d8eb8a74e3c31cea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the malicious intent. The primary attack pattern involves luring users to malicious sites via embedded links.

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.cc/pify?keyword=new+bollywood+full+movies+2018++1921
    • http://files.auntsareens.com/uploads/1/3/0/7/130776484/3860199.pdf
    • http://files.kushaklaw.com/uploads/1/3/0/9/130969446/xilalarijewosalitel.pdf
    • http://files.soccerbanter.org/uploads/1/3/1/1/131164090/lorixopezideko_jokudebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/guzezelasijowoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/30825097795.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/bamebuseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/babuxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/bipajatufipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7445/files/rikumudero.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5458/files/32237351764.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/61763419684.pdf
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/napefodajologujones.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/81500976636.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_off00005e4e.bin
c705f1ae33f7456821b72753794abac289b7874ed67768e41ffc136233823174
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4E 5788 bytes
font_01_sfnt_off00007213.bin
16d694a72af5b793d702fc226a886d3307453d69b5bdc8b8fbf6c8fdc0fef1db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 10544 bytes
font_02_sfnt_off000095a3.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A3 16164 bytes