Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cafa1bb782a33e…

MALICIOUS

PDF

48.1 KB Created: 2020-07-19 05:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6552c034372ee884ad59bf5ec9388d6a SHA-1: 78c270944246338bd09a341de8c3ec57418aca63 SHA-256: 57cafa1bb782a33e7c77e9d516714f39194284a926d3caebd72f26a3a8f9f4b3
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather as a vehicle for the embedded links.

Heuristics 3

  • 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.
  • 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=manuale+digitale+clasa+5+engleza+booklet
    • http://files.thebackpew.com/uploads/1/3/2/3/132302833/7205142.pdf
    • http://files.eastbayayurveda.com/uploads/1/3/0/9/130969184/paxubigamupaw-topej-difukubenaje-ledosomo.pdf
    • http://files.nt-drisc.org/uploads/1/3/1/3/131382395/e74e9848f.pdf
    • http://files.freshrescue.com/uploads/1/3/1/3/131398357/2325814.pdf
    • http://files.4livesports.com/uploads/1/3/0/7/130739142/7c7ccbeda.pdf
    • http://files.akbarilab.org/uploads/1/3/1/8/131871602/f2da84e6.pdf
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdf
    • http://files.staychicmom.com/uploads/1/3/2/7/132710638/2448597.pdf
    • http://files.freshrescue.com/uploa
    • https://pafinomoj.files.wordpress.com/2020/06/96441526809.pdf
    • https://subofineze.files.wordpress.com/2020/07/zananunoso.pdf
    • https://zunepajavu.files.wordpress.com/2020/07/lisole.pdf
    • https://zomazezifa.files.wordpress.com/2020/07/28937138867.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/lelifipizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5608/6696/files/6858676259.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/17552722253.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/91883088977.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/22035498500.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/vitofofewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/xamopokaxoxexogipuki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56070096689.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/83691573258.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_off00007b0c.bin
d981b8095ee44e3898a948bd1bf0a8abe299b5f49fb7102db5ba46df1aee18f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0C 5276 bytes
font_01_sfnt_off00008d17.bin
d0a64cf7dd59f10b49fcedd85766c84fd3d90e583039b81b18aa9aa4adc8b02a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D17 11168 bytes