Malicious PDF — malware analysis report

Static analysis result for SHA-256 01062e1a6246e75c…

MALICIOUS

PDF

48.1 KB Created: 2020-08-03 15:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0972edea4518e45711ca19d1ea8a552 SHA-1: 60d2fc9fc6065769927d021ddef9cacb42823356 SHA-256: 01062e1a6246e75c8f4fbf2fe4fe32f5168528706fdedd628573146a82be58d7
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, leading to a malicious redirector at 'https://ttraff.cc/pify?keyword=holt+mcdougal+algebra+2+pdf+answers'. The document body, though heavily obfuscated, contains keywords related to educational materials and the PDF creation tool, suggesting a lure for users seeking specific documents. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a SEO poisoning or link farm attack.

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=holt+mcdougal+algebra+2+pdf+answers
    • http://files.vislitsandbox.com/uploads/1/3/1/4/131483201/ruvifupadelexix_vewurefakifi_dadodosekiboz.pdf
    • http://files.aguirrelegalnurseconsulting.com/uploads/1/3/1/3/131380558/78718.pdf
    • http://files.socialstockwoman.com/uploads/1/3/2/8/132814097/pigarotow-movubiromitux-meferibuz-vobepupa.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.designsafetyllc.com/uploads/1/3/1/4/131437669/7441540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/xagumizugofepazifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/7003349805.pdf
    • https://cdn.shopify.com/s/files/1/0440/9131/0232/files/voodoo_lab_pedal_power_2_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/dorokifadejiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/24385697525.pdf
    • https://cdn.shopify.com/s/files/1/0431/8901/0593/files/56695310572.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/95991220299.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/46569626097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.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_off00007b40.bin
8177818b1bbcbccdf569a38804d6371db889b6fbab4596b763e27419c0ccd263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 5800 bytes
font_01_sfnt_off00008ef4.bin
a9241a2309e1a5cd97df0a0b9786dacf565f4a294f39e39db772397644af6cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF4 10592 bytes

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