Malicious PDF — malware analysis report

Static analysis result for SHA-256 972019ffd23d859f…

MALICIOUS

PDF

122.4 KB Created: 2020-08-17 05:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d10585da7aa47d134cca01f5d85582a SHA-1: 178f8508ed890b21f54df3983ef3ebbdb067a5a8 SHA-256: 972019ffd23d859f5082ea8508557afd75fabbb5da0257d20bb686cf2a40a989
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=yasin+fadilah+latin+pdf'. Another critical heuristic identified a PDF link farm, suggesting an attempt to generate traffic or distribute content through numerous external links. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the redirection attempt.

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=yasin+fadilah+latin+pdf
    • http://files.friendsoftherosenberglibrary.org/uploads/1/3/0/7/130776220/c07d17d18.pdf
    • http://gaviliso.colganscattle.com/uploads/1/3/2/8/132814930/0cb19c8f8c.pdf
    • http://puvadex.jikidenreikipathways.com/uploads/1/3/0/9/130969858/tozisoxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/43574306150.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/67254086450.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/wafatiwavopunoguziseni.pdf
    • https://cdn.shopify.com/s/files/1/0450/9430/5957/files/7852803543.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/natoselolani.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/wawadetugoro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/reworopomabowuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/madubizadelisezino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fawalonilon.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/76086216744.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/budget_2020_rajasthan.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/51011476771.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/1418390379.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_off0001a16e.bin
51f757b611575d609799adcd5f4314e41b5f5423384cec7c1bbca0481d03ff1e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A16E 33392 bytes
font_00_sfnt_off00016d0e.bin
67d72aacd4c4717247e2d7075e230b0a2e20e7d9b349076d7589b71a140ec954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D0E 4992 bytes
font_01_sfnt_off00017e01.bin
ecd2a20622ad20a562bbd1bfac223fbe5ec9abe432eaf597ee1863443365ab05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E01 10360 bytes

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