Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c32506639891f3…

MALICIOUS

PDF

40.6 KB Created: 2020-09-05 00:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcf79e2cdb7c2cbe35d6ae8158471e03 SHA-1: 3288a57d3cd4afd49274e5582a2a2ae019c00fe3 SHA-256: 14c32506639891f313751520576b72f2c2aa953ef2dba00ada6f7437c3698158
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary redirector URL is identified as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to external, potentially harmful, resources, aligning with spearphishing tactics.

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=certosino+formaggio+ingredienti
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b30cf0_75428ef689af424c9b0a670d0726275e.pdf
    • https://static.usrfiles.com/ugd/97493d_6aed949ae0394e93aa885ff1ff243140.pdf
    • https://static.usrfiles.com/ugd/9c58c5_1de25daedfa441d984cbd39eb5ed8c70.pdf
    • https://static.usrfiles.com/ugd/3254bf_a8d7ea54f2c648fcbd5165448ada122e.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_5be0a6e8db204de3a4aaeb064e73973a.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/rocky_theme_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/93120632644.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/12602885498.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/a_level_physics_roger_muncaster.pdf
    • https://static.usrfiles.com/ugd/4dd980_0431bae8223e4d529658ef0dbbbc3932.pdf
    • https://static.usrfiles.com/ugd/10e3af_36de9f414d8141abbd73802861215290.pdf
    • https://static.usrfiles.com/ugd/1a89c8_c439de5fc8644cb788c73bce779c4b5a.pdf
    • https://static.usrfiles.com/ugd/89c6ad_1bb72b9ea7f24fb797bf8a8a6a957ea1.pdf
    • https://static.usrfiles.com/ugd/d1fcfc_78d3a3f1377444da9c056a883677394e.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_off000061c6.bin
e8f3626e7aeb2bb6355dcb34b165269b2c226f1703e12de2664a6cd42eb76ee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 5100 bytes
font_01_sfnt_off00007301.bin
e279b819a23816ab9c5744304e3bdc53f65249145722ded4b71286657d08854f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 10212 bytes