Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a909f6723643d1…

MALICIOUS

PDF

47.8 KB Created: 2020-07-27 13:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb33e4282c4aeef7d167c3f6a696a6b3 SHA-1: 20a0f831afd59c3e53585f96b2828e9447e69070 SHA-256: 57a909f6723643d1111264289d5487999061540eeff0945496280f3493bf2933
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant portion pointing to a link farm hosted on cdn.shopify.com. One of the primary links, disguised as a 'Diablo 3 demon hunter dps guide', redirects to 'ttraff.com', which is identified as malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed for malicious redirection.

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=diablo+3+demon+hunter+dps+guide
    • http://files.carrigartpresbyterianchurch.com/uploads/1/3/0/7/130775866/75564599544c.pdf
    • http://files.grahamhunt.net/uploads/1/3/1/6/131606694/xototijavipu_piwineg_zozolinu.pdf
    • http://files.studio-lady.com/uploads/1/3/2/6/132682039/8601303.pdf
    • http://files.catastrophantastic.com/uploads/1/3/0/9/130969896/jenugoz-fitarepazibaj.pdf
    • http://files.favershamcommunitylandtrust.org/uploads/1/3/2/6/132681343/xifabigi-lamegunepaz-nunux.pdf
    • http://files.favershamcommunitylandtrust.org
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/nuleneligo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/nebonipomefazulimoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/labasol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/80754949158.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/rixata.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/nesatepaninuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/vupew.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/tigelitogenovonijil.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/51579140219.pdf
    • https://cdn.shopify.com/s/files/1/0433/2103/2859/files/kuzudopibutemuzuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/36893473867.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/kukadonon.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ba7.bin
706727dd28a4f5a90803845596fc602b00fc9832a0afb38b00ec1200f11a11dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA7 5560 bytes
font_01_sfnt_off00008e4a.bin
0946d9fc3be4db0350a86849283f054b3addbc07cc4f25e2c43dbf1244710a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4A 10496 bytes

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