Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03be3fb267fd0b7…

MALICIOUS

PDF

112.4 KB Created: 2020-08-13 22:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ecef0fd28dbfc96751fe7e22ad5d7a SHA-1: 8feb80d88383878514f0d3d11eb79d81de888c7c SHA-256: e03be3fb267fd0b77a06d339903cab7d7ddbf645366c7ab7abb16d9398f3640d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=enfermedad+de+chagas+pdf'. This URL is designed to lure users into clicking by presenting a seemingly relevant topic. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO manipulation tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=enfermedad+de+chagas+pdf
    • http://files.terynraephotography.com/uploads/1/3/2/7/132740620/rorisawok.pdf
    • http://files.kauwai.com/uploads/1/3/1/1/131163540/tikajun_fukuru.pdf
    • http://files.caseybealdesigns.com/uploads/1/3/0/7/130775635/7584431.pdf
    • http://xaxobaxo.stevesempire.com/uploads/1/3/0/8/130814297/75c8224cc.pdf
    • http://files.phasephotonics.com/uploads/1/3/0/7/130739024/8f3f2b35a036.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/keligezir.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/biblia_cristiana_de_estudio.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/leeo_smart_alert.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/vanogebepiwazovarogoriwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/brgschaft_vorlage_miete_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/degobik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0435/5014/6723/files/supodegufekofon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85484739365.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/blink_malcolm_gladwell_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2887/9272/files/encapsulation_oop.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_off00017916.bin
3d23ecdd46760f9bfbbf7704cca028fc33727f12842feaf7bdeb4b6a322d23ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x17916 5496 bytes
font_01_sfnt_off00018b9a.bin
207e4a1969ac7ce4260f66e126d585d48189dc6257859801592dbcb0bd21c1db
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B9A 12040 bytes