Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdfb96d33b2ac64…

MALICIOUS

PDF

47.2 KB Created: 2020-08-16 19:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 230a20c7e45d1a910f4d11374863c6b9 SHA-1: ac97be8eb50b0ccb8038b99652c9e2a7188ac61c SHA-256: 7fdfb96d33b2ac64490904222e8606cb89ee5a1ecac76f1f803042c42cb58532
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to other PDF files, indicating a link farm. One of the primary URLs, 'https://ttraff.cc/pify?keyword=bdd+framework+template', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to malicious content.

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=bdd+framework+template
    • http://files.championcamp.net/uploads/1/3/2/6/132682778/vegoxaragof.pdf
    • http://files.toymoverslogistics.com/uploads/1/3/1/0/131070611/3947423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/gajefitesutule.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/dirasogiponiwetaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/anyone_who_had_a_heart_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/bowuzozokeravigopegidis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8511/1203/files/damifusivakuwojebij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/livisimezuzelawi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/duxud.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/mozakoxolujefed.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/78401827505.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/23748908774.pdf
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/34467376189.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_off00007c01.bin
4cb269070e46b719675bb8f70094228329e95574f6c8338f24d9e7e1ca0d028f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C01 5212 bytes
font_01_sfnt_off00008dbb.bin
d13ec37ab42a83d9fa9fdeef894fcd40bfb65c0c18bd6691ff00df5591a826eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBB 10096 bytes