Malicious PDF — malware analysis report

Static analysis result for SHA-256 771b97101de7d703…

MALICIOUS

PDF

116.6 KB Created: 2020-08-09 06:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6be53f2283ad1cfa6e09bf814799497b SHA-1: 7028e19c59326748197e0cf8ad19ce8cd50b1c86 SHA-256: 771b97101de7d7030cc3adc44784b952722773ae8b093d2f02c9acc796f20232
194 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 host numerous PDF files. One of the primary links redirects to a known malicious redirector. The document also contains heuristics indicating it is a password-protected archive lure, suggesting it is intended to conceal a malicious payload. No scripts were extracted, but the presence of numerous external links and the redirector strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=human+activities+and+their+effects+on+the+environment+pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.duboiscountyhumane.org/uploads/1/3/0/7/130740069/doxezimu_daxikilewe_sosexo.pdf
    • http://goruralu.wealwayswander.com/uploads/1/3/0/8/130874493/gesemunogapi.pdf
    • http://files.baileybloomco.com/uploads/1/3/1/4/131453031/wijijotafu_develuj_sugelibomir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/berivobemelawetepoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/60643343517.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/lokudametexafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/kitefisijakaluriwem.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1526/files/22626759853.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/mubavofudevapo.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/zumefeperedewojelolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5395/files/nurefirunipam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/lumat.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/where_rainbows_end_cecelia_ahern_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1780/4708/files/xonitofavirexexudupoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/novez.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/zoxaribipusijabuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/biwid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8243/2160/files/tvs_auto_rickshaw_spare_parts_price_list.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_off00018d60.bin
c29cca5859730cd0deb5e357a25b042492d0dbb3e8163cfe3803ab42f47bfb27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D60 5384 bytes
font_01_sfnt_off00019f83.bin
d48b825d4ae653b028ff0010be150c4b3fe3b2ed14e3a0f7f8f8bc574c2cd1c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F83 10656 bytes

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