Malicious PDF — malware analysis report

Static analysis result for SHA-256 6848f28448e4c254…

MALICIOUS

PDF

59.4 KB Created: 2020-08-10 21:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83ca1426df29362ba6e66650489faa92 SHA-1: 9100c19063c6c45d03add3f7e2fc6ec1766c76de SHA-256: 6848f28448e4c2548b220d456f1581a7412aa66b49c42db804c0caddc868f04a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Bosch company profile pdf'. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=bosch+company+profile+pdf
    • http://files.ntxsportswear.com/uploads/1/3/1/4/131407802/23d2a4819e2e61.pdf
    • http://rusexu.mickylynnsroom.com/uploads/1/3/1/4/131454012/c4b61835bbe878.pdf
    • http://files.thepeacesyndicate.org/uploads/1/3/1/4/131454521/tekavewilawulizijoni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/java_split_array_into_chunks.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/65474174283.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/rabexojivezigexobifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/48692223259.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/90105523056.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/fallout_new_vegas_stability_mods.pdf
    • https://cdn.shopify.com/s/files/1/0428/8456/3110/files/21699773730.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/zaxufipukikexadaner.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/kepasugakixozomumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/texapaxixezeromen.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/koxibup.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_off0000a8ac.bin
dd3d2104f26b6893eaa7d55dc7c3350532cb7a417fce65d8e190ae0757935879
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AC 5544 bytes
font_01_sfnt_off0000bb5c.bin
b8032887d62e0475e8a539295a33a0ff33a1e7b63ec04b786f37f4a7cffc673b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5C 10852 bytes