Malicious PDF — malware analysis report

Static analysis result for SHA-256 627f1cba0926400b…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 08:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d05076aad6ba4ece062b5bc50305daf SHA-1: a054779b121007ac4c8120088bc6569ae4469092 SHA-256: 627f1cba0926400bbe9b0fb9c244e9e5dc5cd4cb4905babf9fa9c8bafcd2691c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, contains text suggesting a 'Halloween word search PDF' lure, which is likely intended to trick users into clicking the malicious links. 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=halloween+word+search+pdf
    • http://files.standtallbakeshop.com/uploads/1/3/1/4/131407855/luvakozatinovemotuxe.pdf
    • http://files.australianbowhuntingmedia.com.au/uploads/1/3/0/8/130873708/supezosa_pijututug_satawewewe.pdf
    • http://files.thickandthintheatreproductions.com/uploads/1/3/1/4/131453256/xodejo-dazubopuvenizi-lozat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/lovizafegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/64256904143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/sogemebegil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/gewezipijidazemuruxaku.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/40421403499.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/5693399790.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/jinexalununugowipusor.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2960/files/vomika.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/58467698829.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/livestock_wealth_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c5.bin
e26178d75b57db1c0c8c7a942a0e4becbf61c47c1a8888954a0b9a0fef115fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5 5296 bytes
font_01_sfnt_off000069d4.bin
49ee11a632aa869d7cd097267bc4fe389d93f1a483803ed5bf4bc38ee21a16ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D4 10120 bytes
font_02_sfnt_off00008cad.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAD 16312 bytes

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