Malicious PDF — malware analysis report

Static analysis result for SHA-256 563c6555f96c6bc7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 10:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fb44effe58a9ce1ec8ca2fc9e1ef35a SHA-1: bfe5465a7cddd9a8796c8fac084c4cfc57df3fbc SHA-256: 563c6555f96c6bc7f3c43e695c819cb49b3a06ea322a5d0472d452c4dccc78f1
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary link redirecting to a known malicious domain. The document body text, though heavily obfuscated, contains the phrase 'Job hopper resume template' and the malicious URL, suggesting a lure to trick users into downloading malicious content disguised as a resume template. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure.

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=job+hopper+resume+template
    • http://files.dinas-decor.com/uploads/1/3/0/7/130775310/ec5c7.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/best_resume_templates_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/3179394903.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/poe_granite_flask_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/all_classes_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/michigan_durable_power_of_attorney_acceptance_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/fazobipunelujujapejojet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/tuvolowodeteduf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/robeats_auto_player_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/vekakirovemug.pdf
    • https://cdn.shopify.com/s/files/1/0434/8932/9312/files/bufibukubemapiruw.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_off00006120.bin
930ccd9a69f506176336c39da71dbdffc7d646c5f18debc4ede8220b7c84c36d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5188 bytes
font_01_sfnt_off00007290.bin
67a9dfd7f77021f998d8d5c432c60614c3d2221642b97f52ead992cddf1d15a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 10352 bytes