Malicious PDF — malware analysis report

Static analysis result for SHA-256 308143e804befafa…

MALICIOUS

PDF

37.4 KB Created: 2020-08-30 23:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22c98c897ddad0fd13d851a6f5d3ae0c SHA-1: c516317fe03d7a0dd118df9480e0d094d2665182 SHA-256: 308143e804befafaaa226f29772dbecf057a731323541056ee732bff8c39f190
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/wix?keyword=plc+program%25C4%25B1+indir'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports its malicious intent. The document body appears to be obfuscated or corrupted, but the presence of the URL within the document text and the heuristic firings indicate a likely phishing or malware delivery 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/wix?keyword=plc+program%25C4%25B1+indir
    • https://static.usrfiles.com/ugd/7d1dc9_a81c397609e940f99c70b0a14faf7798.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad486d779b744cffbf4b9b74eba9bf46.pdf
    • https://static.usrfiles.com/ugd/b8c837_03469f8f1a1c4133900d943862dac300.pdf
    • https://static.usrfiles.com/ugd/3e9e83_ac2b84f344294204b0dbba247882464d.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/star_wars_despecialized_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1701/files/pathfinder_bestiary_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/malondialdehyde_lipid_peroxidation.pdf
    • https://static.usrfiles.com/ugd/ae059d_c795da080a1441868700d4cc170cb971.pdf
    • https://static.usrfiles.com/ugd/6d59ab_10dcca0203444064adef85a43a58e7d6.pdf
    • https://static.usrfiles.com/ugd/4dd980_f15a859796bd4aee81f246b137df7090.pdf
    • https://static.usrfiles.com/ugd/bae363_274b867043f24af189a7fdad957a5346.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9b8e2d6641343489e16d1e6645c7033.pdf
    • https://static.usrfiles.com/ugd/9421c8_0ea77f2921ab44f7815fe125f82ab2f6.pdf
    • https://static.usrfiles.com/ugd/9e53d4_75379b7ea6bb48caacd6c38155918873.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_off000050dd.bin
99ca61b8a955dee9af6412fc22d456e7cc836544f05328c9a3b490d236cdb07a
pdf-font-stream PDF embedded font (sfnt) at offset 0x50DD 5248 bytes
font_01_sfnt_off00006296.bin
f3c6cba8e42dd6d407aa3653903945be2ee723ab448e1e55ffb8a83b1e2dc7dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 11900 bytes