PDF malware analysis — malicious · b683241437a15e7a

MALICIOUS

PDF

40.6 KB Created: 2020-09-03 04:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 249c24d6e37ba09ed77be8e4329486ed SHA-1: 72e66fb54d56bd32e11af9c1e86f904cbe634417 SHA-256: b683241437a15e7abd4640465b725634db005b11f8c197a80feee4f3a85ee595

154 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, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=condensation+polymerization+reaction+pdf', is designed to redirect users to malicious content. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=condensation+polymerization+reaction+pdf
- https://cdn.shopify.com/s/files/1/0434/9850/4354/files/julemesovusatixeluz.pdf
- https://cdn.shopify.com/s/files/1/0434/8438/1337/files/xavitoziwakopip.pdf
- https://cdn.shopify.com/s/files/1/0432/5860/9819/files/31796836738.pdf
- https://cdn.shopify.com/s/files/1/0437/4655/8113/files/97467782474.pdf
- https://cdn.shopify.com/s/files/1/0430/2074/6906/files/mosoz.pdf
- https://cdn.shopify.com/s/files/1/0449/9108/6750/files/math_playground_sugar_sugar_2.pdf
- https://cdn.shopify.com/s/files/1/0430/0580/4698/files/agriculture_durable_en_algerie.pdf
- https://static.usrfiles.com/ugd/e2c250_a1c86743adda43fa992e8e1bf8993d8e.pdf
- https://static.usrfiles.com/ugd/c1108c_9486d071e6d74f67a6d58fcd71d6018a.pdf
- https://static.usrfiles.com/ugd/bdeb4c_d0fb9a79cff94c509822b4986a1a5d12.pdf
- https://static.usrfiles.com/ugd/64e449_82d4e79fb6264a459e1266e1dd65cdde.pdf
- https://static.usrfiles.com/ugd/bf07b1_a8742d86e85c418bb705deec4ff1944b.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000622d.bin` `867202376ec4eb0f3ac20062333b5e0b7e1a8a3cadf559622cd8f28367e78593`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x622D	5360 bytes
`font_01_sfnt_off0000745f.bin` `42646f6522a528dbe90ea5eede2953d898be2699d04c35c1c02fa13051840173`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x745F	9684 bytes

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