Malicious PDF — malware analysis report

Static analysis result for SHA-256 80494b516658bd5d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 23:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d96799f3163f7cb933321f958d671820 SHA-1: 6bbb21107c556d9a77122054742a32094ef6a964 SHA-256: 80494b516658bd5db607058aa962853d280f3693efaa290ea65a667084b45f55
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.com/pify?keyword=baixar+pdf24+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted, but the presence of numerous links and the identified malicious redirector strongly indicate a phishing or scam attempt.

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=baixar+pdf24+pdf
    • http://files.unitedkingdomvintage.com/uploads/1/3/1/3/131398542/06db50a.pdf
    • http://files.florinsquare.com/uploads/1/3/1/3/131379594/pogas-pukom-fawozebiler-sumofozumagobux.pdf
    • http://files.longlanecorgispei.com/uploads/1/3/0/8/130873945/9675f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0061/9423/files/xasiromovidiwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/milomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/foxufelobarukejetuvokawuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/wunemolopane.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/94242689714.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/7392405635.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/pesekulasopupajim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/gugamavizekanokosejuvi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/split_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/93686222111.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/fiwebobebowatipaxekavejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/2885613562.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_off00007647.bin
6e4e3a34ac17a2131bf929da44ce3ef6f814f98587f2c0098936c50f3a5a2a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 5164 bytes
font_01_sfnt_off000087f9.bin
c04ba16ed811615c0327c27fe37dd30f5f10b94c8aa5722907c9ba02ab1dc350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F9 10228 bytes

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