Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e7a2206a638dac…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 08:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f706d4da296122c4cd84cb66ed0817 SHA-1: 1af33407b970eb53589a3afa2af0604008abc400 SHA-256: 88e7a2206a638dacf0231ceab1c15cf5c03cb0a5476a30ee129eebfe57d45bcb
150 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with the primary link redirecting to malicious infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to download a PDF. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=cultural+factors+affecting+consumer+behaviour+pdf
    • http://files.mydearestbaby.com/uploads/1/3/2/6/132680813/gurutagu.pdf
    • http://files.one-common-ground.com/uploads/1/3/0/9/130969206/1e173f34cb.pdf
    • http://files.4sapservices.com/uploads/1/3/2/6/132681560/229853.pdf
    • http://files.triceceramics.com/uploads/1/3/0/9/130969368/xexedunekeko-podani.pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/tufarogijusejegilazizoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/31297004208.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/java_8_collections_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/56627971865.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/windows_xp_sp3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/pufadifesudigavuneze.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/concentric_zone_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/dodorijowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/calcium_dietary_sources.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/vipopavufukire.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/tonakizatokol.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/75325838846.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/36857947666.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7952/files/americanah_summary.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065da.bin
7fdff1557eaa6b0b277ab2ca3ac9401510f3e41d29d09a631684f8aa5d4692be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 5676 bytes
font_01_sfnt_off000078f7.bin
9331417bac5eb3f5cb6ca6071c8490d7d57690a5dff1f11e73dd32b220983fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 9260 bytes

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