Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb523eb20ea9c6b…

MALICIOUS

PDF

47.8 KB Created: 2020-07-27 09:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6c474a82428a62848043d649c124318 SHA-1: 27fd195873edb4aa05ee482d7a3c2505da3c5dac SHA-256: deb523eb20ea9c6b7992c1293b9839671489eee43f77bf616e05e38ae3084ca3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be tricking the user into clicking the malicious link, which then redirects to further malicious infrastructure.

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=al+quran+standar+indonesia+pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • http://files.shoplblb.com/uploads/1/3/0/8/130813997/lizopanag.pdf
    • http://files.ryanlaneleather.com/uploads/1/3/2/7/132741110/9862531.pdf
    • http://files.cosplayinkfactory.com/uploads/1/3/1/6/131637254/wozemigizof_dujafeg_koxabunalikazir.pdf
    • http://files.tangiblegreen.net/uploads/1/3/2/7/132712040/8077110.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/87409073199.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/xatutaperutikaxofolemo.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/lanivalofabejixanuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/surasirutuvav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/xazamikedowinugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/35262560336.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/fafewixonopaxatovifite.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/42202920054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2634/files/97410933821.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/kukemirugojuvubes.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/
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/surasirutuv

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e1f.bin
e7c2e0a06f4d3f5cf957709f6964efcd917c85b0059cbf7e71dcc8ed84159cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 5032 bytes
font_01_sfnt_off00008f40.bin
6d213d6475b7a736de5601f04cd3a7c83f119ddc5be7f052fd690a60675a2f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F40 10356 bytes

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