Malicious PDF — malware analysis report

Static analysis result for SHA-256 09181ba59e4adc5a…

MALICIOUS

PDF

41.0 KB Created: 2020-09-13 00:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0821879acf9d8df5ecf26a0fe7e514e SHA-1: 282f2e5f949de363a98599a94036ec415026d8cb SHA-256: 09181ba59e4adc5aa2284ef2da2f373e66e8199edc8590ad047517d13a74be78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body text, though partially corrupted, includes the URL 'https://ttraff.link/wix?keyword=pinoy+tv+replay', suggesting a lure to trick users into clicking malicious links. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content.

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.link/wix?keyword=pinoy+tv+replay
    • http://nipukif.hermosahistory.com/uploads/1/3/0/7/130776322/japavujidad.pdf
    • http://vupiv.foxfieldrecoverymission.org/uploads/1/3/2/3/132302868/kanipuwubug.pdf
    • http://files.plan-itink.com/uploads/1/3/0/8/130874284/5511195.pdf
    • http://files.tormot-biurorachunkowe.com.pl/uploads/1/3/1/6/131606092/621017a4.pdf
    • http://files.sunshinecoastcounselling.com/uploads/1/3/2/6/132695360/525bc3843f92fd.pdf
    • http://files.newdirections139.com/uploads/1/3/1/4/131483154/3ab95be8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/subapovisuvomakimol.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/dadutuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/brooding_management_of_chicks.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/40995276796.pdf
    • https://static.usrfiles.com/ugd/3eb4bd_6965d2a077da4c979b0f4b89962edacc.pdf
    • https://static.usrfiles.com/ugd/82d61e_06ad63a4a112414c94066a8bdeae1230.pdf
    • https://static.usrfiles.com/ugd/7e84b7_8ee053ae5ece4f7aa8d1634e6ff7b9cc.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006561.bin
d17528b04d72b21a613affd10437bc8a95e75be83d85ac22bcb74691eb15a76b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6561 4800 bytes
font_01_sfnt_off000075cc.bin
203d1aeb1bb62023890a03b3b53b2237542d92cc9e775befcdc830240987a35d
pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 9888 bytes