Malicious PDF — malware analysis report

Static analysis result for SHA-256 453e0b358b28ce42…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 23:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3034eb93e9defa78f823c09b60368b25 SHA-1: d1b4e54fe03859a4405756c284f59059ba7fe30b SHA-256: 453e0b358b28ce42265d895490d4ba140828f08714a49d091cbb6ad5719fdc49
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to other PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.cc). This suggests a link farm or redirector strategy designed to obscure the ultimate malicious destination. 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=college+basketball+recruiting+guidelines
    • http://wuzifa.johannariddle.com/uploads/1/3/0/8/130874232/gaxugetuveden_difod.pdf
    • http://files.ragdollkittensale.com/uploads/1/3/0/7/130775197/sudavategiduwaz_rusanesosa_dodukijogubalit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8423/files/nufajiwibulez.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/63886122703.pdf
    • https://cdn.shopify.com/s/files/1/0431/1046/5698/files/20724840303.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/49899634812.pdf
    • https://cdn.shopify.com/s/files/1/0440/2393/9237/files/numagivadozi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/gedovuxuponenune.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/anaconda_prompt_commands.pdf
    • https://cdn.shopify.com/s/files/1/0447/3257/9996/files/vanireroniridixokabim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/61806690540.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/sujekigikobepufaxiwetuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/nanasoja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea5.bin
92306b1f08c751c4e37a3d6ec75eaf41395ef3663262583a954295f18ec3d55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA5 5216 bytes
font_01_sfnt_off00007071.bin
6bfc699088f2e211c2244dc2f245ae0a7fffbeccdae7db74ab3fe553e2c7a160
pdf-font-stream PDF embedded font (sfnt) at offset 0x7071 10032 bytes
font_02_sfnt_off000092c3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x92C3 4324 bytes