Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9f0f00553bbe5f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-27 14:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac5e4260cca777cdd0184f87e899473 SHA-1: a9762e0302df428830948cc449b5ceae84092378 SHA-256: 0e9f0f00553bbe5fa544404eab130a25c326b0eeb90ceddc2d62c8b5c8a77844
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to a 'Briggs and Stratton 450 series 148cc manual'. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=briggs+and+stratton+450+series+148cc+manual
    • http://zalora.thesokofund.org/uploads/1/3/1/4/131438234/vawexadilakogozu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0981/0343/files/417579257.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/periodic_table_color_coded.pdf
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/37794425500.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/84740444952.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/2163118488.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/1563992629.pdf
    • https://cdn.shopify.com/s/files/1/0463/2435/1131/files/rca_7_android_tablet_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5865/files/gegewabogakirakuvezina.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/6395633428.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/56014177123.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20807514836.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/guwejilumoloxukipevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/fusafasisuxisewiwis.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_off00005f25.bin
16478b18adb802cbe588753c870971edff1fbaf1b48c2a7210a90d9b1edacd4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 5908 bytes
font_01_sfnt_off0000732f.bin
e9c3c9028355a085a0de78ae1cc7775e81fa3513e208469e7871c2d939c0d117
pdf-font-stream PDF embedded font (sfnt) at offset 0x732F 10216 bytes