Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce0529956fb9695…

MALICIOUS

PDF

52.7 KB Created: 2020-08-21 16:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 386e304fa47f0d78bc8a2d3a16eef3e2 SHA-1: d853688710fd7a347a5d079db0bac7a7a7934e77 SHA-256: 1ce0529956fb969501cdc39a248d63ff36c5f0cb0ec4bf00aa322fd7a0bd227d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a primary link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to brochure design templates, suggesting a lure to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent.

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=brochure+layout+design+template+vector
    • http://files.thijmendoornik.com/uploads/1/3/1/1/131164419/jozeke-letux-tabelujefupuwuk-vosesipekaxu.pdf
    • http://files.catrinatenganartistry.com/uploads/1/3/0/7/130738696/cbbab214db61.pdf
    • http://nirorav.engageandcreate.com/uploads/1/3/0/8/130874493/sediwenonulere-gidupusozamete-xodesiredore.pdf
    • http://revuzo.balloontwistersdcvamd.com/uploads/1/3/1/3/131383332/0a7716fc.pdf
    • http://files.dreamingofthereds.com/uploads/1/3/1/4/131406082/temezotiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/berujixawajibexuxutuzogar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/bonokedaxag.pdf
    • https://cdn.shopify.com/s/files/1/0436/6719/4021/files/27723377932.pdf
    • https://cdn.shopify.com/s/files/1/0447/7334/3383/files/wutimeravawofavitin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6271/3754/files/77066896826.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/42762287751.pdf
    • https://cdn.shopify.com/s/files/1/0429/2155/8183/files/digital_image_processing_gonzalez_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/77620519633.pdf
    • https://cdn.shopify.com/s/files/1/0437/8109/5581/files/super_scout_specialist.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/54159365654.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/zoxumeravenetimefo.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_off000080f2.bin
2b9073914b2ed16ac4b3541a02778414d0b442e56c425e0d655bb338f27f2c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F2 5580 bytes
font_01_sfnt_off000093cf.bin
6c6210bc95befcc223d60f9dc92be7e678395a45d3eadb4b84e2dc9bf5317dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93CF 10544 bytes
font_02_sfnt_off0000b7e0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E0 4324 bytes

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