Malicious PDF — malware analysis report

Static analysis result for SHA-256 1771f0d04f024e97…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 11:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e1ebd724859f97f1a0e3b0fb815540f SHA-1: b7db7b8afc9120641ee8b710cb69055d6dd266fd SHA-256: 1771f0d04f024e97675a2dc8c772c1c7027954ff5eb3029b5d13a607d975733a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary purpose is to lure users to a potentially harmful site for phishing or further malware delivery.

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=anthonomus+eugenii+pdf
    • http://files.raymondbordogna.com/uploads/1/3/0/9/130969115/a56aceeac9d.pdf
    • http://files.pranaya.org/uploads/1/3/0/8/130874162/nivazu.pdf
    • http://files.mrnolleysscienceclassroom.com/uploads/1/3/0/7/130739712/domum.pdf
    • http://towizime.staidans.ie/uploads/1/3/2/7/132710797/eea0b616a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2816/0418/files/2614777670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/embed_a_in_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/96146963713.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/int_input_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/xetafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3653/2136/files/womamejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/46439022764.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/39341210220.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/muvalenimagebuzakomus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7134/0698/files/rubisuwogu.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_off00006ae0.bin
d082ceb9ef8866fe5b2d1abcfafef1c22debb5670c1d3b34dd19f3337c34b887
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 5104 bytes
font_01_sfnt_off00007c25.bin
29d53b60d2a31548f5dff2fd5cc4afec560fdb04b7ee80799eeca83ba90a30f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 10056 bytes