Malicious PDF — malware analysis report

Static analysis result for SHA-256 604ca29f3bd053ef…

MALICIOUS

PDF

36.9 KB Created: 2020-08-14 14:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 130bb1990b104da433681ac45c4ed0fd SHA-1: 7e090d92719f6d1637916f2616f9ae938a824c21 SHA-256: 604ca29f3bd053ef20bc7755a6e0a55cdf184657e99401a3b99d8f02d99d6aee
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious content. The primary redirector URL is https://ttraff.cc/pify?keyword=vijayawada+durgamma+thalli+naa+songs. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

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=vijayawada+durgamma+thalli+naa+songs
    • http://files.fixintorepair.com/uploads/1/3/2/6/132681033/dawowu-vaxavoti.pdf
    • http://files.lvcchp.org/uploads/1/3/1/4/131452878/900ebf3f37472.pdf
    • http://files.gabrieleraussewinery.com/uploads/1/3/2/3/132303378/biganepagoxipu-bukosun.pdf
    • http://zugozipet.surreybulldogs.com/uploads/1/3/1/4/131409090/tuvegibuxe_raminawemafiz_forawobobezaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0198/6723/files/nakesemofepujulisupegumex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/git_permission_denied_publickey.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/assassin_s_creed_ds.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/vanilur.pdf
    • https://cdn.shopify.com/s/files/1/0436/1846/7997/files/badapatupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/rudofedumagulisenurubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8973/0472/files/40814835962.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/kukujoruvotupakofutojobez.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/24105934233.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/54341321224.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/56838354873.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/bonerura.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/nurobififupu.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_off00004fef.bin
db494c8715bc3386f101557e589a13151fa895ee9ba4acf84198caf0bbdd102e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEF 5472 bytes
font_01_sfnt_off00006279.bin
17f024b7a5ca2bf88c6b19e25b88bc61ac8e91eb8a709f2ba2671805e151a4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 10872 bytes

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