Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7656f72e39fe248…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 21:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f492e6075c43ed19539ed878f95f0151 SHA-1: d41f784be7af44d1939353f8f1d7baa0fb53ece4 SHA-256: b7656f72e39fe248d7876ee3cf055527984fbd9fd2aa1938dd659f682e4081bf
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms. One of these links, 'https://ttraff.ru/pify?keyword=articles+definition+and+examples+pdf', is identified as a known malicious redirector. This suggests the document's primary purpose is to drive traffic to malicious sites, potentially for further malware delivery or phishing. 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=articles+definition+and+examples+pdf
    • http://files.upcycledonline.com/uploads/1/3/0/9/130969339/2735800.pdf
    • http://files.lakeokarekapreschool.co.nz/uploads/1/3/1/4/131453005/temow.pdf
    • http://files.ionasoccerclub.com/uploads/1/3/1/1/131164473/mufafesarinab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/biological_psychology_journal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/gipewalupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/58165888665.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/wavidakaxupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/bavarokaxuxalawigapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/galugixanodegapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/storm_glass_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/xupuzutumixevidelaxenazos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/mekisigajotobafokiremexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/didoxivuwelabefeberaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/fijakafivalezagotodadudo.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_off0000632e.bin
0b3fe4d2b99e4184ce2b2d2208a68d1e15c760cb8925f98aeccf1b642e7c68b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5360 bytes
font_01_sfnt_off00007556.bin
5b497738144a157a5c48fb755dab3ee428e4c19f34d979c7d24b78c271dddc47
pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 9848 bytes