Malicious PDF — malware analysis report

Static analysis result for SHA-256 9742bc4d03f296f8…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 00:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5a3ebe5517e7b28d787006b1262af7e SHA-1: f6a32aef9c9260ff8c04548bd724aa077d1497db SHA-256: 9742bc4d03f296f8e2fa3023060f45d4b0dfbd98c80243eb2028441367646368
152 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one prominently leading to a known malicious redirector at 'https://ttraff.club/wix?keyword=animal+crossing+new+leaf+player+appearance+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of a PDF link farm further indicates an attempt to distribute malicious content or traffic. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=animal+crossing+new+leaf+player+appearance+guide
    • https://static.usrfiles.com/ugd/353d00_e7f29488cf2147fd9a2bf4e702fe2bc4.pdf
    • https://static.usrfiles.com/ugd/07e02c_f3fecae4f15847d0881dbca3de1842f0.pdf
    • https://static.usrfiles.com/ugd/912de2_fa6a63695d7c43b7bde80d7f50b6be9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6245bf216f30484d83cdd35d1fab4265.pdf
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/42554894661.pdf
    • https://cdn.shopify.com/s/files/1/0464/0381/3531/files/goliguzijodedu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/centech_digital_multimeter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1477/3141/files/gidafetanegez.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/686366027.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/benep.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/72502350716.pdf
    • https://cdn.shopify.com/s/files/1/0463/2674/3201/files/41753544757.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/florida_deferred_comp_quarterly_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/repufowezar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/zipudepurisabusulewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/animal_farm_george_orwell.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_off00005c9f.bin
c347a5de5f0ff2f614be4e22cf24a46788e36fdd4a5b8c33056c2b95c805c549		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9F 5660 bytes
font_01_sfnt_off00006fe1.bin
1b506a0b601de750276dcd685f77d8768c105cb58d6206c767978b4059d83771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE1 10352 bytes
font_02_sfnt_off0000933f.bin
674485a88ffde5bf8d10779009c5a4a9169dd7034e682705818915a2aea6e109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933F 16552 bytes

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