Malicious PDF — malware analysis report

Static analysis result for SHA-256 735b9c26a0a978e1…

MALICIOUS

PDF

54.2 KB Created: 2020-08-21 06:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd40dc9a19c89a6addcc6589492b103 SHA-1: ae059c8b5c77469acdb5ffe2ff99cf958a34a7ca SHA-256: 735b9c26a0a978e130a29a1b19c97b4a0d983e7d433840155db45cf5bcbb9a7d
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=histograms+gcse+worksheet, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection tactic. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

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/pify?keyword=histograms+gcse+worksheet
    • http://files.fishbowllabs.com/uploads/1/3/2/6/132695870/duxuvekukaniwudilusa.pdf
    • http://gelavubej.impartalliance.org/uploads/1/3/1/4/131407592/beduzewizoveges_tuxeganupon_vozijib_moguxijuwur.pdf
    • http://nizelaxem.garden-artworks.com/uploads/1/3/0/8/130874368/92b233b296e519.pdf
    • http://files.dallasrealestatechoice.com/uploads/1/3/0/7/130739392/luziduzevat.pdf
    • http://files.parentfirstcouncil.com/uploads/1/3/1/4/131452958/wabuwob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/pozupimobabagoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/2386/7805/files/nufiriw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/5044574112.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/lisafezalamovikiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/65622889771.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/83816625719.pdf
    • https://cdn.shopify.com/s/files/1/0432/4032/5282/files/riwovagafiwadorujitinofa.pdf
    • https://cdn.shopify.com/s/files/1/0448/5660/6881/files/amcor_limited_annual_report_2019.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_off00009646.bin
ce909bafcebbccd6b03bf192f7b5cba7b77e1306eedb55753794dab1364a77c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9646 5296 bytes
font_01_sfnt_off0000a831.bin
d71553037a0eb4f368ff8aed52c4a891cfb8c190c19eea85f074494b93ab0d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA831 10428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.