Malicious PDF — malware analysis report

Static analysis result for SHA-256 1970aed9cedefd6d…

MALICIOUS

PDF

33.8 KB Created: 2020-08-18 21:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd9ee53829e44e91719658eac0615090 SHA-1: f3db5a3ea75eefd4af6813996553734d8de12c43 SHA-256: 1970aed9cedefd6d7e2165bcca97669a29dfc0dd6924df0f857acfafc60365fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links, one of which points to known malicious redirector infrastructure. The document body and heuristics indicate a lure for users to click on these links, likely to download malicious content or be redirected to phishing sites. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious 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=systemic+pathology+book+pdf
    • http://papuzu.ashlynnsboutique.com/uploads/1/3/1/4/131437394/8979996.pdf
    • http://natabuw.sdhsband.org/uploads/1/3/2/3/132303382/5507762.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6922/6656/files/22326376060.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/nalibafokosofegozekusova.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/50922864647.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/metezijedelugenuzut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/20265959246.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/28387847288.pdf
    • https://cdn.shopify.com/s/files/1/0432/7810/6779/files/understanding_business_organisations.pdf
    • https://cdn.shopify.com/s/files/1/0434/4676/3677/files/dimekujoxepatufebepevogag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/ncaa_basketball_tournament_bracket.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/77279252064.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_off0000435c.bin
362a3445510b2794742a13956b3a360f2d8ee3649d9019a510b46298449284a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x435C 5880 bytes
font_01_sfnt_off00005742.bin
d2d754a48e64faf8f1e68612a08c240adb91db8029ae4166790dbb879b3fa7da
pdf-font-stream PDF embedded font (sfnt) at offset 0x5742 9928 bytes