Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc2812d28631549…

MALICIOUS

PDF

32.6 KB Created: 2020-08-24 07:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1500ec8d109f2869e978c46b67c63cfe SHA-1: 50f6460a7578ea215665307ee0cd041e45bdb8a0 SHA-256: dbc2812d286315491439896b3fd12d73bf99f5f46af09b2622ad151969ca0d3f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, disguised as a weather report. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content. The document body itself contains the malicious URL and other links, likely intended to deceive the user into clicking the primary malicious link.

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=weather+report+of+babain+kurukshetra+today
    • http://files.yawenyang.com/uploads/1/3/0/7/130775808/ea49c8b8ad97e74.pdf
    • http://files.seapoda-arpg.com/uploads/1/3/1/4/131408204/5829334.pdf
    • http://xebebifag.hockeyaustralia.net/uploads/1/3/0/7/130775797/rivakipezatifesolu.pdf
    • http://gawefajut.harvestseedacupuncture.com/uploads/1/3/1/3/131380600/vonukukapoxupox.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/5399862399.pdf
    • https://cdn.shopify.com/s/files/1/0430/1081/8201/files/libro_sobre_arquitectura_de_computadoras.pdf
    • https://cdn.shopify.com/s/files/1/0438/7464/8232/files/fonop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/lista_vencida_axn_cover.pdf
    • https://cdn.shopify.com/s/files/1/0463/5233/5009/files/sinegeluzoko.pdf
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/83161014471.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5868/files/vasokurufaxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/xevef.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2949/files/dakimugajadub.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004417.bin
fab11813c9cdf4382455453598bd41d3aa80faaa1734942b906edc026effd36d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4417 5416 bytes
font_01_sfnt_off0000568b.bin
274c14bd69c31b8724df4c09e59ec3183679e0c3dc1a76fad1d604c7a2f950c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x568B 9096 bytes