Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf72d1734a8067f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-18 17:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffcaf45b120e6548804cb494aea540b5 SHA-1: 9037431700fa3b85652dd62eae4bb5b89dcf1174 SHA-256: 0bf72d1734a8067f73ce4b2415f8fd662804a85083df85de2f1521ec687d658e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a malicious redirector, disguised as an "Ib biology review book pdf". The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself contains links that are indicative of malicious intent.

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.com/pify?keyword=ib+biology+review+book+pdf
    • http://files.jrsamshoes.com/uploads/1/3/2/6/132680974/4baa4.pdf
    • http://xupusab.dougpurnellart.com/uploads/1/3/0/7/130738764/854976d0.pdf
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • http://files.areyouben.com/uploads/1/3/1/3/131384286/rijudafakadexob.pdf
    • http://files.therinkbattlecreek.com/uploads/1/3/1/3/131398406/4802581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/zidevagevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/tumidolov.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/rogefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/sabowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/legir.pdf
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/kirefepapurixotekofeveja.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/43640932613.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/94266017588.pdf
    • https://cdn.shopify.com/s/files/1/0438/2546/3456/files/jofeduzimajotuxatidaso.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/gesetadaxurorodefuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/minecraft_set_time_day.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007183.bin
adffc895431ed1671787314392962de1479dc6f6de5ffa3f17a71ac64b4f6ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7183 4816 bytes
font_01_sfnt_off00008203.bin
00a1e16e5e8a26ed74364998e809ba6c6f7ef4a6af1dbd8fc5d712bf93c98e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 10548 bytes
font_02_sfnt_off0000a602.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA602 4324 bytes

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