Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de16af173a46d78…

MALICIOUS

PDF

60.5 KB Created: 2020-07-30 03:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 229655cd4b846a4bbb68e7e6bcd6d9bd SHA-1: a1d690ce61e283d9b1aa394066dbd1235a376967 SHA-256: 9de16af173a46d78fd155294c1776dd337fc6aa180d95036181a0ed9b61f21fd
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or phishing pages.

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=definicion+de+sesion+de+aprendizaje+segun+autores+pdf
    • http://files.globalafricancreates.com/uploads/1/3/1/4/131452958/7653675.pdf
    • http://files.percpayments.com/uploads/1/3/2/8/132815767/ce260919da.pdf
    • http://files.cuteships.com/uploads/1/3/1/4/131453250/kokawoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/33611641432.pdf
    • https://cdn.shopify.com/s/files/1/0441/3403/9704/files/seraberedezisu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/fanazejemefitan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/70123228859.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/laneguwabasezurugiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/59413817307.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/gogibizuzevakirokarali.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/1077366233.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4316/files/zokokibilugewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/69585146676.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/32903127892.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/
    • https://cdn.shopify.com/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000887d.bin
b1e51f4d1ec0f841f4d972e53f2e91bbd7c8ceab537c0d9bc58fbddef7ab9282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887D 1844 bytes
font_01_sfnt_off00009147.bin
688885736517fc212f825e72547c600d025e3f64cb415febf406ff8cbcc36b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9147 5296 bytes
font_02_sfnt_off0000a36e.bin
fdc3d3b294a6cd4d38d56e101ec2d5574c3aad7d8385d07959f6ab0899f4a0eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA36E 12096 bytes
font_03_sfnt_off0000c9f1.bin
482d3104c6934c68feb94f85b3a43ac9f5d765b4463e79f0c495fa92c32fdca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F1 16840 bytes

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