Malicious PDF — malware analysis report

Static analysis result for SHA-256 077fd80f29d7f518…

MALICIOUS

PDF

64.2 KB Created: 2020-08-24 23:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0709f1cf0c57687ac437ecee4fc2aa67 SHA-1: 606757e2b3c11c8f522c6a5220ee10279a009fe5 SHA-256: 077fd80f29d7f5182bd291a0e5fa7ddccee5dac8be6e7299734b5fd7eb40cc32
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a book summary. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. 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=brian+tracy+no+excuses+summary+pdf
    • http://files.volvalis.net/uploads/1/3/0/7/130774979/wipogi.pdf
    • http://files.photopiakc-photobooths.com/uploads/1/3/1/4/131437848/76cdb8.pdf
    • http://files.tapptiles.com/uploads/1/3/1/4/131406068/8369988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/no_man_s_sky_crystal_sulfide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/nidazanusutusalokikas.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/65896712650.pdf
    • https://cdn.shopify.com/s/files/1/0436/3157/5198/files/fajugaporibepebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/nabetax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/musculo_cardiaco_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/79677910768.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/lonisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/stan_lee_height.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7782/files/takiwimexurururug.pdf
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/13632829665.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/xusomasene.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_off0000bcb6.bin
dd5eeadebf4045e5d1f6275166a7844360b9c4a6018989f67e4512c2ec7dd722
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB6 5488 bytes
font_01_sfnt_off0000cf4d.bin
cc284d6643a7936ff53ec1ba0db886dad878d8ac25d3e4fc36a513ef19aa68e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4D 10652 bytes