Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed43bbf3fecdb5db…

MALICIOUS

PDF

60.8 KB Created: 2020-08-04 21:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38a6c22ee1370efe06d22419de184d11 SHA-1: 8b6684d51bc4175b97f5b850e5b5dc925128a643 SHA-256: ed43bbf3fecdb5db18d1b3f750380d5d34eb696556870be07fe0157def81bb2f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/pify?keyword=al+quran+dan+sains+modern+pdf'. Another critical heuristic identified a large link farm pointing to external PDFs, suggesting a SEO poisoning or link distribution tactic. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector appears to be social engineering through deceptive links.

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=al+quran+dan+sains+modern+pdf
    • http://files.inspiralpathways.com/uploads/1/3/0/9/130969708/manukasuda.pdf
    • http://files.biggreenadventuretours.com/uploads/1/3/1/8/131872273/sinudibeveso_jabajumigitinav_xuvibu.pdf
    • http://files.arm-group-llc.com/uploads/1/3/1/6/131636903/nafarozamuzebali.pdf
    • http://files.marcuscroom.com/uploads/1/3/0/8/130813663/f147aeb43d20c.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8357/files/wolujilexefipunogapebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/levejaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/wavavaduda.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/76265439811.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/80048544782.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/death_knight_pvp_6._2.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/pafavekosajogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/7717344377.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/75105460490.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/ropadupubolopewunade.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/jojefefokilek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/54283793329.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/64780507566.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
stream_005_off0000b470.bin
f13b3f5227d3a7868976a8433c94f5e11bd7d523aa0b19c90e65b8394cf3b3ba		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB470 27452 bytes
font_00_sfnt_off00007fcf.bin
332a50b9c922b6e0db11e9bee4839584cca9ef9c6711868dcd20eda0750aee16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCF 5300 bytes
font_01_sfnt_off000091bb.bin
795c19ed454e180483bbb32b6354cee0806caf9eca1f91a9a11f91ae5a6f3925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BB 10088 bytes

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