Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a45b482c4d2190…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 18:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbbe9d63388b762394f096b9f6edeb18 SHA-1: d1988567cd97ec6870846241195fe749f5c05c2b SHA-256: 62a45b482c4d2190812bd799e610b8397b19426ad7be14932aaf4bdc4cc9b1f4
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for SEO link farms and redirector abuse. The primary link, 'https://ttraff.cc/wix?keyword=maths+online+worksheets+for+class+7', is flagged as malicious, indicating an attempt to redirect users to harmful content. The presence of many Shopify-hosted PDF links suggests a coordinated effort to distribute malicious content under the guise of educational resources.

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=maths+online+worksheets+for+class+7
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0937/4368/files/super_metroid_sprites.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/varawaruwumasadejom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/guzusuxarinav.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/jukemor.pdf
    • https://static.usrfiles.com/ugd/26938b_1e9bb1d1c9d1433299a1a5ee383245dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b990027b51764463bd2c0b63f04a42d4.pdf
    • https://static.usrfiles.com/ugd/73f3b0_97134d972f0e400b97585398373c8a46.pdf
    • https://static.usrfiles.com/ugd/067ecb_7c3f83d1bdd64274b80dc7098a8fc0fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfc36dbfc92841ee91c1c25decd4610c.pdf
    • https://static.usrfiles.com/ugd/b8c837_43fe713b69d44bbd96c5c0c2bd08fd88.pdf
    • https://static.usrfiles.com/ugd/b8c837_a81dc73f478046abb8e658efe26eccdc.pdf
    • https://static.usrfiles.com/ugd/3b7182_e921101e5bd34850bc2e891b1de694c2.pdf
    • https://static.usrfiles.com/ugd/599026_2d7f3559a1684f96b2f75a44584947e5.pdf
    • https://static.usrfiles.com/ugd/63d3ad_e3a853cd2f094d6bae51b72a15c2ea3b.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_off0000639d.bin
d745a4e08f94ede38329ad70ce7849a540ed7bc12ef8ea26da59356ea0bde905
pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5212 bytes
font_01_sfnt_off00007577.bin
3f53c6ec971bccff20ef7794a146931becfbee7090b8ece7c4b53a45af2ad516
pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 11224 bytes