Malicious PDF — malware analysis report

Static analysis result for SHA-256 8348cf8f49b53df0…

MALICIOUS

PDF

47.6 KB Created: 2020-08-05 14:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e32db6f4e89d9092f041782a302ff271 SHA-1: 2d8117d3bc9ab0fedf5f23c110c0d67e5062ce15 SHA-256: 8348cf8f49b53df0398bfa5308089afe45563c36d7d44a6f1139d8268612d2d2
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to manipulate search engine results, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the redirector. This suggests the PDF is intended to lure users into clicking the malicious link, likely leading to further compromise.

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.cc/pify?keyword=advanced+excel+all+formula+pdf
    • http://muwum.clearperspectivespublication.org/uploads/1/3/0/8/130813095/vokogewi_piduwesu_livug.pdf
    • http://zewen.lerynturlington.com/uploads/1/3/2/6/132681352/8367474.pdf
    • http://files.attercliffepharmacydirect.com/uploads/1/3/0/7/130775232/defuwo.pdf
    • http://xelubo.thelightingsummit.com/uploads/1/3/1/4/131454024/3369954.pdf
    • http://files.multidimensionalchromatography.com/uploads/1/3/1/3/131380870/5426e.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4317/files/jinupiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0362/files/61902169123.pdf
    • https://cdn.shopify.com/s/files/1/0435/8157/1227/files/7101827454.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/15579968963.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/cub_cadet_lt1042_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/6547288041.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/61087884169.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/xolugikifutatomabiduxen.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/50587861389.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/49981213664.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/jujubobo.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_off00006a5c.bin
73d22cc17f2552629bff22d7dc0316770593f999811a8f9d220a6f51e87a1139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 4992 bytes
font_01_sfnt_off00007b43.bin
328ca6ca6c01ef69f83e546eac12a1ec8106343a2687d9217a08271a128f0de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B43 11580 bytes
font_02_sfnt_off0000a1c5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C5 4324 bytes

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