Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d878c40ae61fdb9…

MALICIOUS

PDF

53.0 KB Created: 2020-08-30 17:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1580b58c860f8ef2039b6491751f1e61 SHA-1: 438bcd4ce2e822c69895a1535c7c16931e0dd4f3 SHA-256: 9d878c40ae61fdb9178ce63fa96eb555ca96a3b7ccc273732fd5316efb515c12
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or redirection strategy. The primary malicious URL identified is https://ttraff.com/wix?keyword=new+years+romper, which is likely used to direct users to further malicious content.

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/wix?keyword=new+years+romper
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/banking_services_chronicle_magazine_in_english_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/pajixebumogixitujabegiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/birds_imagine_dragons_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/13077663636.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/fetesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/bowepasowikutamijev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/puben.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/ritofegovu.pdf
    • https://cdn.shopify.com/s/files/1/0450/0973/1734/files/canape_vector.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/platformio_upload_port_usb.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/sezelapozutexutino.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/vated.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/understanding_and_using_english_grammar_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/zipgrade_answer_sheet_50.pdf
    • https://cdn.shopify.com/s/files/1/0464/7452/6870/files/97981280755.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/71756029445.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/dance_floor_anthem.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_off00009284.bin
4865f70663cd2a25a561d34e2f4ae9fdc1a235b194cb3469c7a637dc27a748fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9284 5096 bytes
font_01_sfnt_off0000a3dc.bin
ace25411e4ce4c6e24c19f45f5aeb0486265ee6d7b44b6ffc0986accee0253a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DC 10476 bytes

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