Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b7bdee475913e4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 19:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac80267a3e6deee7ffe90c7ae39ead82 SHA-1: ceaf8a544850af612bc66dcf733e900b3cd2f7a1 SHA-256: 70b7bdee475913e4fce3a0c053c20d6161ac5107a73df800f565132ad684ba2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a malicious redirector. This suggests the document is designed as a link farm to obscure malicious destinations. The primary malicious URL identified is https://ttraff.com/wix?keyword=toaster+oven+cook+book, which is likely used to redirect users to a malicious payload or phishing page.

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=toaster+oven+cook+book
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/h_pylori_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/bomaxasewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/accounting_basics_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0430/6911/2474/files/35321651231.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/jovobi.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b7dcf7a2be4aa09672ee1cf0f27ae1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c131cd4cbad45bc85f6eeee93fa6c88.pdf
    • https://static.usrfiles.com/ugd/ab059d_7247bef68fe8450fa59dc0ed39e3bd1e.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_e6a7070cec3e4f368b682dc79247b11a.pdf
    • https://static.usrfiles.com/ugd/f515ca_7625c435b4e94a4db0b2dfc8dfeee251.pdf
    • https://static.usrfiles.com/ugd/576447_53934a072c7046909a3f557be15ba915.pdf
    • https://static.usrfiles.com/ugd/575363_dafd780818084d09901fd903df353a0b.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/rutarujirobonipubujuze.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3889/files/android_game_mode_notification.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ee.bin
bafcf3ca504c5c0f76cb6ef4bcd3d6b0d76796528a61ab03db49b1c4fd05b26d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 4972 bytes
font_01_sfnt_off000084ee.bin
dfcf89b196b7c014dc3a56270e7eecd7ad689f91d660445543bf56be4bff11ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x84EE 10120 bytes