Malicious PDF — malware analysis report

Static analysis result for SHA-256 14055c9bf51d1119…

MALICIOUS

PDF

54.4 KB Created: 2020-08-20 03:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8001942e9c275dcf9ac10a7d808fb03 SHA-1: 42e33e4770504491e88244ef80e76692f4aefc1c SHA-256: 14055c9bf51d1119173d60a555fa79b753f52eb135ea9bd9c022aed6ee1552d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to redirect users to harmful sites.

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=epreuves+brevet+reportees
    • http://tijeworow.livingnativity.org/uploads/1/3/2/7/132740405/mivuvidurofopimilak.pdf
    • http://files.ozarkminis.com/uploads/1/3/0/7/130776046/3631247.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/23682288097.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/62692720009.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/88820318308.pdf
    • https://cdn.shopify.com/s/files/1/0445/5910/6212/files/dotemako.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/software_borland_delphi_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/2006161919.pdf
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/zeledav.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/basugukasux.pdf
    • https://cdn.shopify.com/s/files/1/0439/0672/8091/files/somewhere_from_west_side_story_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/wolfgang_puck_pressure_oven_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/barcelona_map_metro.pdf
    • https://cdn.shopify.com/s/files/1/0440/8662/4406/files/captive_prince_manga.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/fobupisiburelajimuzuka.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006655.bin
1374d73b19b1e87463e8e46df929f6091e8ecdb3944c109d082c0c2def711ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6655 4456 bytes
font_01_sfnt_off00007585.bin
3957183e8ce92d98792d4d932155d0057f4773d25fcb72ecf8e2056c5eb9c99e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 2484 bytes
font_02_sfnt_off0000802a.bin
540cfc32996d938dc1e8bf9629c14430db88b39e55e1a9ab44d8c4d075207c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802A 12144 bytes
font_03_sfnt_off0000a723.bin
f76e53b1165c770ea72ceccb5e808e1d48d2b426d0b5e274530350a00bad707e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA723 16208 bytes
font_04_sfnt_off0000bc62.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC62 4324 bytes

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