Malicious PDF — malware analysis report

Static analysis result for SHA-256 20430a2b6557388b…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 20:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c9f6301c8a97e721800e01d9e024489 SHA-1: fc71b6df7e79282574d8f0dd7eaa51711caf03a0 SHA-256: 20430a2b6557388bcc89bd150703dfe0a8b8d6609de47a2d06ba5f4da58c65a7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=e+collar+dog+training+guide'. This URL is likely used to lure users into downloading further malicious content or phishing for credentials. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the ultimate malicious destination. 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.cc/pify?keyword=e+collar+dog+training+guide
    • http://lebufiba.rothbartnorthshore.com/uploads/1/3/1/6/131637728/fudidewasukeditutew.pdf
    • http://buvelo.spryderweb.com/uploads/1/3/1/3/131398140/gebinudow_kalateto.pdf
    • http://files.reachatweec.org/uploads/1/3/1/4/131483002/muboxofi-bizax-pirejima.pdf
    • http://doxikase.mountviewcommunitykindergarten.com/uploads/1/3/1/3/131380600/b28f24129c3ea.pdf
    • http://gitijo.peaceoffaith.net/uploads/1/3/2/8/132816042/banozigewaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/41342223475.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/pulofiveruzurupogariwunid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/64003171797.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/75190882548.pdf
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/angielski_wiczenia_sownictwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/wabiniposefif.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/98876191733.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/nibidokodifagemanigono.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/15567593203.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/ditedavolosod.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5353/files/kemewinus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7265/0397/files/46071738412.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/85817908982.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/13986316918.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_off0000713f.bin
5630a1eadb433705209d26051101d9e3e0452fcef4f8cd14f2bb0963f69a253c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 4888 bytes
font_01_sfnt_off000081e6.bin
1fd44cc8183e764dab1805f763826061473905f0e30d735dfeeddc572d2e0f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 10104 bytes

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