Malicious PDF — malware analysis report

Static analysis result for SHA-256 786f5b57aa59fda3…

MALICIOUS

PDF

36.6 KB Created: 2020-08-03 19:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e399f8307b3da5a3873299bc4ffea33d SHA-1: b3b1f03433664aa795fc8f34dac1d7908ce910de SHA-256: 786f5b57aa59fda3a853009bbb680e687202b9a875ecee5413b99de02c0262ee
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm, and one specifically to a redirector disguised as a coloring page. The primary malicious link, 'https://ttraff.cc/pify?keyword=charizard+coloring+page+pdf', is designed to lead users to malicious infrastructure. The PDF structure and embedded links strongly suggest a phishing or redirection campaign.

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=charizard+coloring+page+pdf
    • http://files.emilyrosenkrantz.com/uploads/1/3/1/3/131384281/gidemurexiv.pdf
    • http://files.uncconsultingclub.com/uploads/1/3/1/3/131383681/2626560.pdf
    • http://files.apimagesart.com/uploads/1/3/0/8/130874598/nozesenopawa.pdf
    • http://files.eternalimpactmissions.org/uploads/1/3/1/0/131070207/d4ca2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/peanuts_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0449/5409/1675/files/deezloader_remix_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/ninebojavenikawusidur.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/bulopapido.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/kufezoti.pdf
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/pisabulunagidobelugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/5549660805.pdf
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/wifikopixopipibajavola.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/57341701245.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/fubikutatuzube.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/58978565966.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/vuwuporetigozavuxivumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/92644031808.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/sinibovokosuvon.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_off00004bb4.bin
00e7c294fce2618994bf6e10d5c7b4ea43a9bfd95e431bad6915dcf5cc20f104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB4 5192 bytes
font_01_sfnt_off00005d5f.bin
19ca77e6bb729bba454557dfc46eaa5c2818030bf72abac3ff9ee5d51b9e7618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5F 12632 bytes

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