Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fc8fd9027af279…

MALICIOUS

PDF

50.5 KB Created: 2020-08-03 21:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e2af16bd87b5a6d021dee3d1f3d93da SHA-1: 93149b4a6d5f7806cccaf9bfae7d3ad191d0de57 SHA-256: 05fc8fd9027af2797e1dadd34591d44520d5243044657b71227217e70d215ba2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=meditations+marcus+aurelius+penguin+pdf
    • http://files.bubbasdeli.com/uploads/1/3/1/4/131407469/jidomapa.pdf
    • http://files.thedinopark.com/uploads/1/3/2/7/132740415/6535022.pdf
    • http://files.debbieturnercounseling.com/uploads/1/3/2/6/132695629/6805287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1289/8461/files/96414568886.pdf
    • https://cdn.shopify.com/s/files/1/0429/1313/6799/files/96510273496.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/makiputuwag.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/demimoxesunanaburetures.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/75140898306.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/64700077044.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/27209935892.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/juweliminuxodinelujipixig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/dudakafojuwokaxolazetesop.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/7728977236.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/80262147874.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/xxx_passwords_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/34368307483.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f9.bin
5b051656effc953699f8d623868c8a3d178e4a11539b412903f7359e5b3c88c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 5360 bytes
font_01_sfnt_off0000761e.bin
6cd67331ced0f23811a0fe4a291ffac1934181d6f17bde4f008079b1d630fcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761E 10180 bytes
font_02_sfnt_off0000990b.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990B 16164 bytes
font_03_sfnt_off0000ae23.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE23 4324 bytes

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