Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5321c819693f9e…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 04:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be811584d2273f8df0a8763462857e02 SHA-1: d7cb82d5984ec7f300b0c218a208640f28d8f979 SHA-256: 6f5321c819693f9e11adae9e29f9676f56058d4b4671776289b4bdf115b7710f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL, https://ttraff.com/pify?keyword=photoshop+psd+wedding+templates+free, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a social engineering attempt to trick users into visiting malicious infrastructure under the guise of free templates.

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=photoshop+psd+wedding+templates+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/6808/1574/files/java_jdk_7_for_linux.pdf
    • https://cdn.shopify.com/s/files/1/0434/2130/2946/files/rerizufapotijinekigulog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/boccaccio_dekameron.pdf
    • https://static.usrfiles.com/ugd/e745be_dc7ad3c672eb459ebfa34f3bc6648031.pdf
    • https://static.usrfiles.com/ugd/ca32a8_b36ab4c80fc64d03b8b367b137e30dd0.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_ca43da8c73d2466a8b1c4fa4dccff67a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e00964a1ffd74ca09473117e56c2d0fe.pdf
    • https://static.usrfiles.com/ugd/516793_78e0a5f8c234498b8179789c4028d547.pdf
    • https://static.usrfiles.com/ugd/b13fd1_8e06217a9baa4fe8b71958a4c13f8d88.pdf
    • https://static.usrfiles.com/ugd/b8c837_964d35a497eb428086be5af45f294145.pdf
    • https://static.usrfiles.com/ugd/de60da_c6ca6121309146909579fa80d1d85db0.pdf
    • https://static.usrfiles.com/ugd/05301a_2ac1dd37ceb944b29140cc1a18c5764f.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/votuniriwogubowerowu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/arcane_legends_auto_bot.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_off000061d9.bin
09b86d68e19479ff9bbf97a13e29415d5e1eb7827d0f022e9aea3acd5c50e8a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 5548 bytes
font_01_sfnt_off000074a4.bin
9cf9849ba08bffeb5f29a3b04c6912ddab8c83b52b80172b752ba3f3bfa0aae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 12336 bytes