Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4fc0ff64dad28d2…

MALICIOUS

PDF

50.8 KB Created: 2020-09-02 14:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24a9d5357e89371ee6895b1a7f1a77d5 SHA-1: d9d55fbcd5edaf43ea20fef81bffd51bc9531ee2 SHA-256: b4fc0ff64dad28d27fac7cf74582d85b5e92cb2b3aa14bf602ccd6ffda453cab
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or lure. The primary malicious link is likely intended to redirect users to a phishing or malware distribution site.

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.me/wix?keyword=best+free+indesign+brochure+templates
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/15252617942.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/lm368.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/72426100715.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/personal_financial_statement_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/wokuzipaxivaxazakowitofas.pdf
    • https://static.usrfiles.com/ugd/2c8d66_506913a75e4c491c9bb2ade9bd5dded5.pdf
    • https://static.usrfiles.com/ugd/0047a4_ae8e01ad22684101ac49fa2eec7d4c30.pdf
    • https://static.usrfiles.com/ugd/16a96a_72f3c637f6c14d78b052840247021390.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/98448783491.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/gugutapisekanagufu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/55405096405.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/98140556178.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/bangla_new_natok_2019_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/straddling_the_line_jaci_burton.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_off0000865e.bin
822c9fada59b02f95c6258609d5bc2eb204e7159b558fc62fe32a93e90bdd1dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 5760 bytes
font_01_sfnt_off000099d3.bin
d9fa9babf415a1454e478f457d75f42a9a7a810634cb95f33428e2ec1cb90d73
pdf-font-stream PDF embedded font (sfnt) at offset 0x99D3 10544 bytes