Malicious PDF — malware analysis report

Static analysis result for SHA-256 648e422873d145ed…

MALICIOUS

PDF

50.1 KB Created: 2020-07-28 12:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0c21fa5d0ff55d54c4e4223426f7a1f SHA-1: 6089ee8533b75ebd9620b7720b678ab10eeda6b9 SHA-256: 648e422873d145ed09f6ec2fa1f59bab41dc4b382c1758c34d43a97e97bc5195
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm' and another flagging a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of external links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.ru/pify?keyword=africa+map+printable+pdf
    • http://files.pillowstudios.com/uploads/1/3/1/4/131407351/noluzewimoxi_kurumonab_kexovajef_vapeduzixa.pdf
    • http://files.prairieviewproperty.com/uploads/1/3/0/9/130969346/6098996.pdf
    • http://files.jesswebbart.com/uploads/1/3/1/4/131455543/kugebubu-fekeberuxapokew-zexifubugalig.pdf
    • http://files.drizzleandshine.com/uploads/1/3/0/8/130874567/2149353.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/468529980.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/57423693239.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/mumonubilusoli.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8167/files/75292572333.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/zulute.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/tokusokijumalozox.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/marezemorabekolovujosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3718/files/jowaneripogejobera.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/6837856528.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/serufexibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/1689613433.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3777/files/gupatadukudisimudawafel.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_off0000883f.bin
db9a298cb333f230b3829a61c038d95aec79349f1d87706c43447642006926aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 4932 bytes
font_01_sfnt_off000098d4.bin
a69d27f0c9516b463a59a6e3e54479e0d7a727618a3b19a202e10b1b2d3fc9b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D4 9984 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.