Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0a4dc15ebe2a89…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 13:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6ca46896a39aa1e1b598d418873d76 SHA-1: 5d0d8a2df27dc884092c17b45e6ccb0b31602691 SHA-256: ea0a4dc15ebe2a8915b280b23cb067852e1b7e4b66c37e2235c89265f19ac368
152 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to its extensive use of embedded links, many of which point to a link farm hosted on static.usrfiles.com. The primary redirector URL, https://ttraff.com/wix?keyword=the+greatest+salesman+in+the+world+scroll+10, is flagged as malicious. This indicates a likely attempt to lure users to malicious content through a deceptive link farm. 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.com/wix?keyword=the+greatest+salesman+in+the+world+scroll+10
    • https://static.usrfiles.com/ugd/0511f5_aa6d1d0ce06544f1b784a53630a679cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_44ae3c7fc079487186aabe4770e622f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f625cbcf4794ec5883a050d4165a7bc.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/69881053952.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/92864588189.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/75179584925.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/47369476650.pdf
    • https://cdn.shopify.com/s/files/1/0432/9344/2208/files/11225917802.pdf
    • https://static.usrfiles.com/ugd/b8c837_62638afceee54a0e8e2ac5723e76ca92.pdf
    • https://static.usrfiles.com/ugd/a4d998_1db5a8a4a4ef4c52bfd62e351e09f619.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b6dd5e34a34c318935621fec93e880.pdf
    • https://static.usrfiles.com/ugd/26938b_4c96560135384bafa880d48aa81fcd39.pdf
    • https://static.usrfiles.com/ugd/04e6f9_bfa6559aff3142fd90cac3902d3fb04c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/48966277954.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/bodofovivononuminavozote.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/90688361131.pdf
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/sajepifazafijesaponotata.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_off00007797.bin
324137ef5612321d5f27a84df10d6b60b946f462c4be4fc7ff2fdae3cb16b60c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 5588 bytes
font_01_sfnt_off00008a89.bin
3ab5bc728e48ccec2fa17096012bb761b8cf5dd58dba4c21b3236f74aa16a902
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A89 10324 bytes