Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca1025eae9c62dc…

MALICIOUS

PDF

44.5 KB Created: 2020-08-28 23:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f56a8cd5e783ca0b77bb16b524807787 SHA-1: f98e118a4529c325db918df8bb3d55f42a09b376 SHA-256: 7ca1025eae9c62dcf158fa904712d2da8566372e8bde299aa125422c9577444f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with keywords related to fitness. The document body and embedded links suggest an attempt to trick users into visiting this malicious URL, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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.cc/wix?keyword=gym+exercises+for+muscle+gain
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9048/4131/files/18113049129.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/56972413852.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/votevoxezubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/wedding_march_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4773/files/dulatuwedugepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/redakeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/resufinafubofijegirok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/96863408487.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/rutaxirovebonelugifudes.pdf
    • https://cdn.shopify.com/s/files/1/0443/0187/7404/files/unqualified_audit_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/49708782023.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/95042780596.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/conjugate_acid_base_pair_worksheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_598d6818cebb42b9a47e2967aa1b1525.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c7bc2589ff442eaeb0f013c4b53601.pdf
    • https://static.usrfiles.com/ugd/b8c837_17a860dedf444e51891f04637412621d.pdf
    • https://static.usrfiles.com/ugd/b8c837_200f364c922e45bb91bc11556e7d4c61.pdf
    • https://static.usrfiles.com/ugd/b8c837_60c32697e40e47429aa316643a28fa53.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006289.bin
f48149a512b74b3e4ab076701ff4afba9ee1444dab24462f3235d0339920cc83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 5204 bytes
font_01_sfnt_off00007435.bin
34005b50ed0d238f6263d529844bf2e722dbfdc8ae543fbfc7a1c87bf324990b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 10060 bytes
font_02_sfnt_off000096a6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A6 4324 bytes

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