Malicious PDF — malware analysis report

Static analysis result for SHA-256 25eebbaa534e5ac2…

MALICIOUS

PDF

65.9 KB Created: 2020-07-28 23:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d456b4a961351e9f3cae1217cc782e70 SHA-1: 3897376e3fef267230faa28b7eb4ee52b0ac7605 SHA-256: 25eebbaa534e5ac22e4d1f6b76666ddeb4b873909852a8c33b4bc7b115b40122
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. One critical heuristic indicates a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves leveraging these links for malicious redirection or SEO manipulation.

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=administracion+publica+federal+centralizada+y+paraestatal+pdf
    • http://files.connectedhealingllc.com/uploads/1/3/1/8/131856713/6690941.pdf
    • http://files.leongathletictherapy.com/uploads/1/3/2/3/132303068/sudaxuvizenu-joxanow.pdf
    • http://files.shirleywatsonfinancial.com/uploads/1/3/1/3/131381414/sumogatokakep_femim_dopibedixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/55322629047.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/xajifaved.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/85234466117.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/funikatabomudej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/33504122857.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/36770651013.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/10831380300.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/68435484914.pdf
    • https://cdn.shopify.com/s/files/1/0430/6554/0759/files/sinisumetipoxelade.pdf
    • https://cdn.shopify.com/s/files/1/0432/3989/9304/files/88817064578.pdf
    • https://cdn.shopify.com/s/files/1/0431/4621/5584/files/lavodetarikeraxigofuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/86959237030.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/49930219348.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_off0000c237.bin
84ec133a3ec30867c6da1b4ecab44d8f09eab437c5cf0ce4c2e7eba375d73495
pdf-font-stream PDF embedded font (sfnt) at offset 0xC237 5464 bytes
font_01_sfnt_off0000d4b5.bin
ad556ac31c866a5d21a20e7991fecbd55042273d94113a3f0770774dd20d1603
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 10740 bytes