Malicious PDF — malware analysis report

Static analysis result for SHA-256 d522a3e24b0dd2aa…

MALICIOUS

PDF

50.9 KB Created: 2020-09-01 03:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc6c9bfead710f17ca6ca10bd590de8c SHA-1: 891676b21bb22e7b7412abf601a7cfff20c69ef1 SHA-256: d522a3e24b0dd2aad5961b4fbcf8f88e2072a1c302f5ffc15cf25bb666619ed8
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL and appears to be generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=aap+hypertension+guidelines In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dcb5058c29704033828765542c911985.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6924eb_bc527196f62f433f85bb8932c9b72fc9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/913720_5a5e335a95864d0a9b476ccb25f76090.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/576447_8ce699c518644ee29d51f4a88042bfdc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_51bddcf388c84e22a194f1c8fe00d4a5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5fd5c1_dcc17236edf54c318fe2d5beffae4605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/darumutobovile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/numusafezoxesuvexajib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/present_perfect_tense_exercises_multiple_choice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/25734424431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/dakokesomojepunor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/8610900629.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7143 5312 bytes
SHA-256: 9e706d996e3f88c46b5742e0669959298862a09c884a5825203ed8c30c0ea051
font_01_sfnt_off00008356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 11556 bytes
SHA-256: 76f835eb8afc249276e3fd5d00997c5de88c420332d62af72b2c775bc5bfff83
font_02_sfnt_off0000a8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F1 16316 bytes
SHA-256: aca9d55988c6676475e3b08f81553e0332b16fe059812fe008bdba06dc22cfc1

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