Malicious PDF — malware analysis report

Static analysis result for SHA-256 622144fa65f27c53…

MALICIOUS

PDF

50.5 KB Created: 2020-07-27 22:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974077c20cae4adc2574aee1e527c93b SHA-1: 98c652abcc03579fd09c2bf350d23594addcea5b SHA-256: 622144fa65f27c536bcde18aab7e997e0292fb253e35a4ff7a3c764c0b27232e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'sales report'. The presence of a malicious redirector and a large number of external links indicates an attempt to direct users to potentially harmful websites, likely for phishing or malware delivery.

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=nassau+county+comparable+sales+report
    • http://files.simplysailing.ca/uploads/1/3/1/8/131856852/1930131.pdf
    • http://files.ecsmge-2019.com/uploads/1/3/1/6/131606874/rixogoxe_xedutefak_jegufipasemiba_ragidanazezaxa.pdf
    • http://files.kempasjw.com/uploads/1/3/0/8/130814676/naxozuzi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/godobuzesegusaxada.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/99762358663.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/zunofevitiduzuroxumuxum.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/96391847070.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/72037351881.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/rirexaweso.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/zewit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5190/files/63037980893.pdf
    • https://cdn.shopify.com/s/files/1/0434/6537/5908/files/virik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/fukirukojepid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/tanoladasosozekekoz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087c2.bin
ad41c97a5bd1d3c84e3c946c38f3599034dc9a0ee61c045d0a888adff56620f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C2 5124 bytes
font_01_sfnt_off00009916.bin
6214644a7a32d09a804a75bd5c7ecfe381fab428129794900a0128992f36aa0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9916 10500 bytes