Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9293340607e62b…

MALICIOUS

PDF

55.3 KB Created: 2020-08-31 04:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e277e341dc4e27baad965ea8ec42df1 SHA-1: d516381268e41b3cac39563d61d9ec885a356961 SHA-256: 0a9293340607e62b5d7b06443ba1ab76488efda2bda5cae99aea099cdcc26af0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=the+essential+secrets+of+songwriting'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though partially corrupted, contains text related to songwriting and the URLs, suggesting a lure to a malicious site.

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.ru/wix?keyword=the+essential+secrets+of+songwriting
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e3c460_d3273ba795294b19bac05aa35e0448f6.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_384ceb62350b47c0b7a14abcd146630f.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_124c3118497945fdb01b239bd85bdcd3.pdf
    • https://static.usrfiles.com/ugd/80bfa9_3b5fbf184cf942499c87b2e566defadd.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/poberumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2655/files/ganisutapukekogaweravi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/82015869663.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/lofujetijekikakaxexurag.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/xevit.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/crackling_sound_effect_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6371/files/55585278038.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/vujaniromazanura.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/fawoniku.pdf
    • https://cdn.shopify.com/s/files/1/0465/4704/2462/files/2006_monte_carlo_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/process_of_mummification_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/75904952150.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_off000098f6.bin
57d40e75eea3001fb3412483faf3c3ff68397f89c5bf40acf3f577573b96d128
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F6 5184 bytes
font_01_sfnt_off0000aa9b.bin
2e1a257f6aea1c8662b79e3adc2c98ae41b4448e923d161cace0e2a5a1d36e92
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9B 11032 bytes