Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70cd69d24dc64d6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-10 10:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 220cf538e697f2edb2548404887ce0ea SHA-1: 4381a1c2e35c98b360ac49124fab88f997651e3d SHA-256: b70cd69d24dc64d637012979f3534bda19ed7b4fae7b73ece79c070a4007cee7
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=bsc+1st+year+differential+calculus+solutions+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious content under the guise of providing educational materials.

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=bsc+1st+year+differential+calculus+solutions+pdf
    • http://files.miradorkidsyoga.com/uploads/1/3/2/6/132681891/5968992.pdf
    • http://files.banjodanielmusic.com/uploads/1/3/1/8/131856072/demal-gewibibal-binafuti.pdf
    • http://files.desertliliesbazaar.com/uploads/1/3/0/9/130969742/xixirujamorobagixu.pdf
    • http://files.signalmountaintravel.com/uploads/1/3/1/3/131379567/pefog-goporaz-mezedivuteledit-sirijekesowuk.pdf
    • http://files.eggazine.com/uploads/1/3/1/0/131069978/gogazer-mizoxe-xaxile.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/14952850426.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/judepupexom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/91030127016.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/80127030116.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/jasukezegadumugeloxofazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/11582921957.pdf
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/tudakewadujimotevetumet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4096/files/besag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/62081073509.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/63722328203.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/43318212496.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/dobedibupojesiwikojod.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_off00006677.bin
c8c7d97601fc6da8c1540930c1cab805acc8d0535b4ada226358f0da1c9a23a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5352 bytes
font_01_sfnt_off000078cd.bin
8a4671c171be58b49bf497869fe91933535fa97e78bbd219f0b5173bfb8f257e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CD 9472 bytes

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