Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea989ad101b8f0b0…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 15:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b971398500e97ab96adbf5ef249a698b SHA-1: 89b5516cb8a4ce362c7825ed94d2f84422b533f7 SHA-256: ea989ad101b8f0b0b940131b14a2d5389e960f92f7cea4b5a22eb97aebf005fd
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded in the document body. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the URL https://ttraff.cc/pify?keyword=2020+calendar+malayalam+pdf+free+download as malicious. The document body text, though partially corrupted, also contains this URL and references a '2020 calendar malayalam pdf free download', indicating a lure for users seeking this content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=2020+calendar+malayalam+pdf+free+download
    • http://files.vistamapwayfinding.com/uploads/1/3/0/8/130874394/37222.pdf
    • http://files.holacommunityarts.org/uploads/1/3/0/7/130739776/zurupaba.pdf
    • http://files.colourismyworld.com/uploads/1/3/2/7/132710697/xazofuzales.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/woocommerce_nested_category_layout.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/fopolinusidomutoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/17021258758.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/vozitoteluwazamekuxevafab.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6854/files/verbe_etre_et_avoir_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/pexotedapemimudek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/22820300661.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/anatomical_terms_of_location.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/26277194694.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/rance_vi_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/ramamoletozebulifada.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_off00005249.bin
47c2419fad5f3e6ba26537b58435b9a954a87f4e89ade7a9d5d96b077769b481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5249 5156 bytes
font_01_sfnt_off000063a8.bin
01ae12343a304e300e5eb03e6771650af3a192ead723f5cb3f9d7cf08eb625e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 3564 bytes
font_02_sfnt_off00007172.bin
53e1d9ce404362e524155cceb1b2ac9398ecb6e14ffeb945aa8f4c936b66bcfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 4120 bytes
font_03_sfnt_off00007cd9.bin
b848a772e04afd8b0dddea4f88936b837ec3013479e49c4c9dbd58ac1b809d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD9 9896 bytes
font_04_sfnt_off00009ed2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED2 4324 bytes

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