Malicious PDF — malware analysis report

Static analysis result for SHA-256 a011439dd19de7f1…

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 08:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7473cbe906bfef9d5c5c4e30d15c13 SHA-1: b52d3cf85215992e2db1c8de4bde7c4d288ea428 SHA-256: a011439dd19de7f1d443246675cd7b92b53d1005cc3eca03dfaa67d588d3e272
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body and embedded links suggest a lure related to 'Starbucks nutrition uk pdf', likely intended to trick users into visiting the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or to distribute malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=starbucks+nutrition+uk+pdf
    • http://files.menasci.net/uploads/1/3/0/8/130813550/zodebasekegiso-tugisezelunin-wakorabad-vijokajeja.pdf
    • http://files.sjchocolates.com/uploads/1/3/1/1/131164168/1295729.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/keganoremuneferodimobowaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0927/7095/files/50569829703.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4641/files/joindre_plusieurs_ensemble.pdf
    • https://cdn.shopify.com/s/files/1/0463/1209/5909/files/actual_keylogger_3._2.pdf
    • https://cdn.shopify.com/s/files/1/0443/2871/4396/files/95650418638.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/manual_and_automation_testing_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/28810045754.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/tupilogikinekedufikizugix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/sarowisedidekopajigiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/59886731392.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_off00005db9.bin
043a0a0dcd500af101e8b2cf8add221240eb298fbaae10a59f5348dd780994e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 5424 bytes
font_01_sfnt_off0000702d.bin
3879ca29710973c61527743fdef12eecf5daf9b76c4febaa1e08804a079c4c68
pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 10356 bytes