Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7f0244fc87bf6b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 16:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25ed7fa549f0142fd9a4a8c27064b3ae SHA-1: 768ac1cb16c999f3a0e1514ea7bdc4d2e47bed54 SHA-256: eb7f0244fc87bf6bab7adc118e849e90affa6b7db9f9c8ec0117faf30f14a1cb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or redirector strategy to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern is the mass distribution of links within the document body, likely to lead users to phishing or malware download 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.com/pify?keyword=plasma+gasification+pdf
    • http://files.veronicawolfeartist.com/uploads/1/3/2/6/132695445/a03a69820.pdf
    • http://zoteg.ciptippresents.com/uploads/1/3/1/3/131379803/xalufofujimaf_wutetenog_pawaj_nosepamejix.pdf
    • http://files.ladkilove.org/uploads/1/3/1/3/131379219/66046.pdf
    • http://files.phillyiday.org/uploads/1/3/0/8/130813757/3776058.pdf
    • http://files.summerfoxart.com/uploads/1/3/1/4/131410479/tixavufop_tiwopagofoj_zemiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/dogenupabupifetibed.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/xukiwatuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3001/9237/files/administrao_de_medicamentos_enfermagem.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/65807483228.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/44314186145.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/subnautica_recharge_battery.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/genekimakokeseru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/37105936303.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/gilded_alter_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/93616227638.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/92733690257.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8874/files/58829250365.pdf
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/bodivun.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/72564325652.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/
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f0.bin
149a323c9f211417fc6bc295e300e8792b66044dd1e6eb20a99135dffe6a1faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 5380 bytes
font_01_sfnt_off00007638.bin
3eb042520cb5db401b1ac8ab796566f90cf8ae8e57cefbaca44fd244f72e52ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 10632 bytes

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