Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e6a040d3f5224a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 00:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef78c650c9d11372e22ab82bf0a9546d SHA-1: aaa541bb793580e53ed540fc66f6b64d77858c3f SHA-256: 68e6a040d3f5224a94006b22965a75dc7b5c8799257141978eb3fc1455a4b25c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious sites. The document also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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=kern+building+psu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/aparato_respiratorio_tortora.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/81259354306.pdf
    • https://cdn.shopify.com/s/files/1/0435/9634/9602/files/how_to_find_cephalon_fragments_on_mars.pdf
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/24574179842.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/nizojuxekudewaxeziwuput.pdf
    • https://static.usrfiles.com/ugd/b8c837_f521d7e0de444cb08eeb6e89e57dbc35.pdf
    • https://static.usrfiles.com/ugd/b8c837_8298f1fa6bdb441c93f0ece271c65248.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce8485c771254e16b8da408b3e5501c1.pdf
    • https://static.usrfiles.com/ugd/e4a001_2aee9af772f449fbbc51c87e0db29475.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e4e2a1d621446939847d2da4ef603dc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0428/6093/7382/files/donulaxujedupisoxolazomi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056fb.bin
230a7e64e0b7844b0177b1c17885b3dec65083ad27717dbf12bcd7fb5f8dea34
pdf-font-stream PDF embedded font (sfnt) at offset 0x56FB 4720 bytes
font_01_sfnt_off000066f4.bin
77de985a012fd08933aee5457e88283e27dd7dcaf879adf435edb8eda0aff98a
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 11052 bytes
font_02_sfnt_off00008c2c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2C 4324 bytes