Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f095c1d5f5cb76…

MALICIOUS

PDF

54.0 KB Created: 2020-08-24 23:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: effe0cc8b6a8134928e38a30a0dd9435 SHA-1: a9d15bf13bb93a13ddc2d47e47575dbd92ae6f10 SHA-256: 49f095c1d5f5cb76dd245a3e19ac8a8a6881573100d4a2b64220c4ada5c2d7d7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, containing numerous external links. One of these links, https://ttraff.cc/pify?keyword=berserk+anime+1997, is identified as a malicious redirector. The presence of a mass of external links, including a malicious redirector, suggests the document is designed to lead users to potentially harmful websites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=berserk+anime+1997
    • http://files.dasilvavideo.com/uploads/1/3/0/7/130775983/simumapororeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/biophilic_architecture_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/nafelum.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/20260446819.pdf
    • https://cdn.shopify.com/s/files/1/0438/1097/9997/files/livujakozove.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/26791487798.pdf
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/wadesonasenunonujowuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/tegekumirazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/33724717385.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/xuvumupil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/62284757463.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/sopepapojupojawiwop.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006715.bin
27e08d9af8e34ebfb2ecfebf27f53c2966ace9814e2bbcde4e72ab31b12200b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6715 10304 bytes
font_01_sfnt_off00008982.bin
b9437227669bc259a52c920d36cc1996f3df9be09ae131a0e4aa3227b43ab783
pdf-font-stream PDF embedded font (sfnt) at offset 0x8982 4800 bytes
font_02_sfnt_off000099aa.bin
e5f649a919b0188fbcf55fe707a0b485435098f9973c3f6c38db6a2a62135705
pdf-font-stream PDF embedded font (sfnt) at offset 0x99AA 10308 bytes
font_03_sfnt_off0000bcf0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF0 4324 bytes