Malicious PDF — malware analysis report

Static analysis result for SHA-256 59358213be9fe937…

MALICIOUS

PDF

49.6 KB Created: 2020-09-10 07:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24541e9aebf11241185f3ffc4c4912a4 SHA-1: d8a70c33403f7d529208759c1c162d3c1eb163e6 SHA-256: 59358213be9fe9374a2d283da8e5d98ed6f5c8e5d80a8af81bd4f02b205535ac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.club/wix?keyword=phonemic+chart+sounds'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector.

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.club/wix?keyword=phonemic+chart+sounds
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://files.thebrionnarenee.com/uploads/1/3/1/6/131606603/46fde18d753c1b4.pdf
    • http://pejomut.ohayosensei.com/uploads/1/3/1/4/131437502/baveboliduvupe.pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/16631155298.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/jedivitatufusun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/sagitafudowelagab.pdf
    • https://cdn.shopify.com/s/files/1/0437/8204/5853/files/don_t_starve_together_cracked_multip.pdf
    • https://cdn.shopify.com/s/files/1/0440/1401/0518/files/pukizesubatedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/sample_agreement_form_for_lending_money.pdf
    • https://cdn.shopify.com/s/files/1/0435/2960/1178/files/zidafekufusosupiposage.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/47168141882.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/tamil_yearly_calendar_2019_free.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_off00006185.bin
01457c6771f5d076827afdc61f382c75ac2ed9e7562f0921767edf5d925764cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 5148 bytes
font_01_sfnt_off000072d4.bin
32e2d51814e54bcc25bbf6907ee1debcdbdaca76a9454c967c076a42a7693b37
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 24220 bytes