Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe62456a193dfdb0…

MALICIOUS

PDF

49.9 KB Created: 2020-08-03 16:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b069179e98ff0c46bad86ddcc483fb8 SHA-1: 339de5c6c25049ccb6bb9875cb1c26f7579102bd SHA-256: fe62456a193dfdb0845b49558ef4855523ce8970319733d784c38fcafe89c738
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bringing+out+the+best+in+everyone+you+coach+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=bringing+out+the+best+in+everyone+you+coach+pdf
    • http://ligozana.natalieariannebaack.com/uploads/1/3/1/6/131606201/wofebulivigapobema.pdf
    • http://files.oemhondaparts.eu/uploads/1/3/1/4/131406248/2051399.pdf
    • http://files.stopabully.ca/uploads/1/3/1/8/131871569/7949dc6.pdf
    • http://files.neverendingcycle.org/uploads/1/3/2/6/132681698/notawadirevulow-zuxagatozewavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/37637142914.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/megaman_battle_network_walkthroughs.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/monumaxupaposajef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0434/9214/7352/files/lezebuvujulevaveja.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/zuxulibupamaraxalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/lebidusufemunobine.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/gujamoliledokevonawite.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/gusevagabagedufanixega.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/93020896504.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/75367826830.pdf
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/66429807106.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/tuluk.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_off00007738.bin
f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7738 2828 bytes
font_01_sfnt_off00008141.bin
2d8665a3127c6f2daf23f2e8027d99254a83185c0d0a10afc56cbb0c633e6145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8141 5736 bytes
font_02_sfnt_off000094d9.bin
7c5dc2879122b7d90333b4056a5394edbe6a38e86206f9828ed9497fc7799e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D9 10312 bytes

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