Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed9356a5c283f4a…

MALICIOUS

PDF

37.0 KB Created: 2020-08-24 02:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85ab775ec55de4c20fecb3e218c7e3e SHA-1: 28b1b6fc60895074d85dcd91ad753e79f38c5859 SHA-256: bed9356a5c283f4a2215e5d47603fb6bdfd64d017e2c419d8d6e19aa998d0b52
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, a technique often used in link farms to manipulate search engine rankings or distribute malicious content. One of these URLs, https://ttraff.ru/pify?keyword=coding+decoding+new+pattern+pdf+ibps+guide, is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body itself is heavily obfuscated and contains some of the URLs, but does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=coding+decoding+new+pattern+pdf+ibps+guide
    • http://vunonafo.kansasiberians.com/uploads/1/3/0/7/130776054/4096448.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/los_bandoleros_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/20010992890.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/24748829126.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/cset_multiple_subject_subtest_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/sotowuduforakurerajomowed.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/bertrand_russell_principia_mathematica.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/66079683996.pdf
    • https://cdn.shopify.com/s/files/1/0429/3545/1804/files/pabinesusagixoriwinisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/baixar_arquivo_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0431/7914/7430/files/10414330790.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_off00004f0f.bin
1b8649e6abf3446b186030a7fccfe9f4e18383165a814967cba257c7241b46bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0F 5428 bytes
font_01_sfnt_off0000619f.bin
9f7c24a110c835414cdf07a4f43c97664475b81bef807b821da07b5c0c33ce80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619F 11120 bytes

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