Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9371ad7e162fba4…

MALICIOUS

PDF

58.8 KB Created: 2020-08-04 22:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1958f2b4075712e4aaa65a46eca17b4 SHA-1: fa67c30cff14290c99245ca2ff3383f303050d81 SHA-256: d9371ad7e162fba4bf2e19bcb094d3704f6da1348db82f96a657caf7d43b9df1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, disguised as a search result for a technical book. This indicates a phishing or malware distribution attempt. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=download+thinking+in+java+3rd+edition+pdf
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdf
    • http://files.artisanfarmsbreeding.com/uploads/1/3/0/7/130739544/segodi_deximatoxuv_nekapikena.pdf
    • http://files.stninascoffee.com/uploads/1/3/1/4/131437878/zipodaguleribe-toxakepulure-xokezexiwaxowo.pdf
    • http://files.livelikelove.net/uploads/1/3/0/8/130814132/bazetulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/poulan_weed_eater_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/bewobiratifupunubasusa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/39167843393.pdf
    • https://cdn.shopify.com/s/files/1/0434/1923/8562/files/golavoganironorateke.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/wunudeninuwiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/42621688998.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/jikavukujej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/91788208735.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a698.bin
4a5777b610317433e1c84810b8c1885ba17274964b4c0608777fb0fd0cd5cbc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA698 5580 bytes
font_01_sfnt_off0000b9c0.bin
f4097a128ec3a62bbd68e5dede43f98020bfb1af030d99b4df300bd5ecf96f40
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C0 10596 bytes