Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a40be9c1c80a478…

MALICIOUS

PDF

67.0 KB Created: 2020-08-06 05:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a40f95c452b94f1db85a8ce29d45eac SHA-1: 20464fa48e15924fd5833337d4e3f163eee8cc37 SHA-256: 9a40be9c1c80a4787bb710ad28541ead31610a2f9a3d765308baf2809b7eadee
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=best+english+sentences+for+daily+use+pdf'. This link is designed to lure users into clicking it, likely leading to a further malicious download or phishing page. The PDF also hosts a large number of links to other PDFs on Shopify domains, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content.

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=best+english+sentences+for+daily+use+pdf
    • http://files.livingthedreamraceteam.com/uploads/1/3/1/3/131384374/kodefa-misomupabene.pdf
    • http://files.petermarcusgreen.com/uploads/1/3/0/8/130874495/goxetasivaxixuvulo.pdf
    • http://files.bunnyandbearphotography.com/uploads/1/3/1/3/131380354/korupijoxed.pdf
    • http://files.pontiacweddings.com/uploads/1/3/1/1/131163601/gigerusabare.pdf
    • http://files.martelart.com/uploads/1/3/0/7/130775387/vadofasebejemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/68987043457.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/15167537236.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/41469492361.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/lavemolowenemudize.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/17556378910.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/skyrim_ini_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/68249587063.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/dorikavawosil.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/yu_yu_hakusho._torrent.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/makev.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/8977832690.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/davapoxonasonesorale.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/nomerarenoronafezulanapip.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009871.bin
94c320145ca2f8416457429c8e3963abd65d7ae1fc422bfef73da4ec62109792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9871 6476 bytes
font_01_sfnt_off0000a876.bin
37d6096d3ffdffe549093622c1dedb22fca37dccb775acc1ccad89a0f9bfd030		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA876 5568 bytes
font_02_sfnt_off0000bb66.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB66 1800 bytes
font_03_sfnt_off0000c3f4.bin
69b5dd091b4dbb488d1244319b82c6e1a8920043da3e2cb255ceb34fa00c6c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F4 10348 bytes
font_04_sfnt_off0000e780.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 16312 bytes

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