Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c103ec44d2bfd2b…

MALICIOUS

PDF

53.9 KB Created: 2020-08-10 09:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc859a4fc1937129ce317f7754d3513f SHA-1: 44c0134a8b3548bd157a87bea8393cdb7854bfc8 SHA-256: 4c103ec44d2bfd2b324c05d1d8dcbe5fb97cd091a7703a4b4d2fd6ca89b58824
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, ttraff.com, disguised as a recipe. This indicates a phishing or redirection attack. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly supports the malicious nature of this PDF.

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=fruit+cocktail+recipes+pdf
    • http://files.sopoligalake.com/uploads/1/3/0/7/130739590/zosemo-bawoxa-vezufexa.pdf
    • http://files.paulmolinadesigns.com/uploads/1/3/0/8/130874585/vasux.pdf
    • http://files.your96.com/uploads/1/3/1/1/131164275/lasuvo.pdf
    • http://files.selfexposed.co/uploads/1/3/1/3/131381910/192458.pdf
    • http://files.grimoirequest.com/uploads/1/3/0/7/130776592/sigupozikutovuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/local_anesthesia_in_dentistry_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/26032754674.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/63293279815.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/probability_theory_and_stochastic_processes_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/shanann_autopsy_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/el_balance_general.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/xorevinubito.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/poniwul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/27244026431.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/economic_and_social_issues_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/xuzapugagadunituxul.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/gatobitibozefonuvexefugo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ec1.bin
ce7ea11c3020eab656934b595ac0ccac9b4fddac658b6574ce89c68af0a3aa2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 5168 bytes
font_01_sfnt_off00009069.bin
df89e1bd23b2db975af48e693a26f8a46f7378cfa31ac6ec6671fd57b3feaa3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9069 10468 bytes
font_02_sfnt_off0000b469.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB469 16204 bytes

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