Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddec24fd79806bf…

MALICIOUS

PDF

60.9 KB Created: 2020-07-31 07:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3656b41dead44d698011821e132a9f4d SHA-1: 269b3e7c39a18eb1b2d81bd98ac46189a0bec101 SHA-256: 6ddec24fd79806bf2014aeca4b0a501fb27237db5b063e06966941f37a643685
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure known for malicious activity. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate an attempt to direct users to harmful sites. The ML classifier also flagged this PDF with high confidence, suggesting 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/pify?keyword=making+relationships+work+barbara+de+angelis+pdf
    • http://files.worldscreenculture.tv/uploads/1/3/1/1/131164048/497e88a9d670326.pdf
    • http://files.jemun.net/uploads/1/3/1/4/131437538/zimef-pafitakimu-kazuwapofi-xefulogekasa.pdf
    • http://files.adventuresaroundscotland.com/uploads/1/3/0/9/130969433/zajega.pdf
    • http://files.shafonlinestore.org/uploads/1/3/1/4/131406365/e53099b918c4c.pdf
    • http://files.leniquecawelcome.com/uploads/1/3/1/0/131070483/4c21544bad8f21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/gobunigawigava.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/sawabulabopofegipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/gurimazumaxapozaxaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/zamisenukapev.pdf
    • https://cdn.shopify.com/s/files/1/0437/5868/2273/files/5507823712.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/rupafezusud.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/pevamegexiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/93757227894.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/dejowi.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_off0000b0bc.bin
28e31b5eaf973bab0f9d351175c5a4fa50be6224c915c9b37e31afe015f1ecf4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BC 5392 bytes
font_01_sfnt_off0000c313.bin
c3362f4f94d658113033f7c48fb846a9e5ae957b292ad008eed2cb13807652f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC313 10348 bytes