Malicious PDF — malware analysis report

Static analysis result for SHA-256 346d7c27a61ef46e…

MALICIOUS

PDF

37.9 KB Created: 2020-09-04 08:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fcec568e842c5b2f5eff518ef1e1c0e SHA-1: f0fb009c16b61b62d89cb844ad47c95cf1e045e6 SHA-256: 346d7c27a61ef46e25803996584eb14fb4b745c226d86ce4c124386507744705
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common technique for SEO poisoning or redirecting users to malicious sites. One of the embedded URLs, 'https://ttraff.club/wix?keyword=raghuvaran+b+tech+movie++naa+songs', is identified as a known malicious redirector. The document body itself is heavily obfuscated but contains references to the same URL and other PDF links, suggesting a coordinated effort to distribute malicious content through a link farm. The ML classifier also strongly indicated maliciousness.

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=raghuvaran+b+tech+movie++naa+songs
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/aaa_dollars_mastercard.pdf
    • https://cdn.shopify.com/s/files/1/0437/8027/6375/files/sorifozururimabopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/reservation_form_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7615/files/sodateviratepinebutulomu.pdf
    • https://static.usrfiles.com/ugd/912de2_522b5cc49eb0418391a4202ef6ff4d9a.pdf
    • https://static.usrfiles.com/ugd/eda9ba_82b681adee114111aa5ef4fd2a711aaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_95df6e8f657f45de8168c8e1257aeb4f.pdf
    • https://cdn.shopify.com/s/files/1/0435/4670/6088/files/adobe_reader_setup_offline.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/xojabumuxopelol.pdf
    • https://cdn.shopify.com/s/files/1/0438/8962/3208/files/13988834862.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/nesajemolori.pdf
    • https://cdn.shopify.com/s/files/1/0470/8732/1246/files/tomimuwokesajakapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/dilufumatedamimigow.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/64133353253.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/30898277663.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/tesugenifanoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/jnnp_submission_guidelines.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_off00004b6d.bin
840a70af15a4c6354d50bb3239f50f46e92e0ac896976c985cfb1cadddaff42f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6D 5388 bytes
font_01_sfnt_off00005da4.bin
7c29a07affbd05fb363322d68ba4292b942794cccee00371a251e4aa0617a546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 13940 bytes

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