Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c96b10facacceac…

MALICIOUS

PDF

44.1 KB Created: 2020-08-09 18:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e89130cd4476694657919801ac2a891a SHA-1: e7c70d894af164fd685ea1eaafb8328d45309a25 SHA-256: 2c96b10facacceac9eb412334d88ee97bcdcbf48cc9a0dd82f6876be25538273
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The primary attack pattern appears to be a lure to a malicious redirector, potentially for SEO manipulation or to serve further 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.ru/pify?keyword=amsterdam+mapa+turistico+pdf
    • http://files.lincolnsbloomington.com/uploads/1/3/1/8/131872178/3274143.pdf
    • http://files.distinctmedia.ca/uploads/1/3/1/3/131380848/tikojan.pdf
    • http://files.oakislandcompendium.ca/uploads/1/3/0/7/130776619/bokatof_gutawab_linozobipepevak.pdf
    • http://files.monteranderson-author.com/uploads/1/3/1/6/131637896/lezenuzunujananit.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/jerodubuxevabujekereg.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/nevuruwejide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5774/0957/files/grammar_games_and_activities_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/vezezirujajerune.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/niwegoxovuvutat.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/97319251094.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/calculus_3rd_edition_rogawski_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/lusulajaxizufelixozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/8114384528.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/8010663821.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/xozokili.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/itsyourturn_com_make_your_move.pdf
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/54321235165.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651a.bin
854361aeadf6de94b705cea4b3104b33c2bb7a4130be00bb2f921f2732967198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651A 5260 bytes
font_01_sfnt_off000076dd.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 1800 bytes
font_02_sfnt_off00007f6b.bin
5cef6e3db73a5a3967747d258771dcacc0630d72e02ae0a7f6581cc01b23dd73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 10636 bytes

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