Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de10137b093f82e…

MALICIOUS

PDF

57.6 KB Created: 2020-08-11 19:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 243243df10116e7889ca6a322df7735e SHA-1: 4b6f039b96dd174e8f01564357fe4852c443257e SHA-256: 3de10137b093f82e03a03b7ca0f49703b712b7a05d8ca2bb4f11361c54eb88bf
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links, constituting a link farm. One prominent URL, 'https://ttraff.ru/wb?keyword=one%20night%20werewolf%20cards%20pdf', is identified as a malicious redirector. The document's purpose appears to be directing users to potentially harmful external sites through this extensive link network.

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/wb?keyword=one%20night%20werewolf%20cards%20pdf
    • http://files.wlnhelena.com/uploads/1/3/2/8/132814680/54d267635fad.pdf
    • http://files.familyfactor.org/uploads/1/3/1/4/131407818/481c08a.pdf
    • http://files.awraidaho.org/uploads/1/3/2/8/132814166/budilow_fuxud_gawazuripupit.pdf
    • http://rebagiw.revivalwavesofgloryministries.com/uploads/1/3/1/0/131070450/bavazalixujunuga.pdf
    • http://lowakak.bestbusinessmarketing.net/uploads/1/3/2/6/132681579/kajonivot.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/24491517504.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/merchandising_accounting_journal_entries.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/75837284173.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/41143518136.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/13745808720.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/19810519863.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/poptropica_counterfiet_island.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/angular_2_cli_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/38467634027.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/vamixodinaluxazegimise.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4423/files/jerozivusu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007b39.bin
32d5033402ae9a0bbd20420b5aed66db54d886918a45f89b1a2e00cfefd799e3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7B39 16716 bytes
font_00_sfnt_off0000691e.bin
5a1d67a558da1cd6dcf06098e21ef77c696c147c527161a252e19b602b4addf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 5324 bytes
font_02_sfnt_off0000a8fc.bin
203016df893736f2307b175b087cc945b398c60910ec0881e27b84f471546577		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FC 9028 bytes
font_03_sfnt_off0000c7f8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 4324 bytes

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