PDF malware analysis — malicious · aa035e43b9e3d457

MALICIOUS

PDF

43.5 KB Created: 2020-08-04 14:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0960a145e692c1f1fdebb80aee8bf319 SHA-1: 3c75cb0851881dbf1d795953aff0c6ed299c5a47 SHA-256: aa035e43b9e3d457b7b5f32f69469ad38141d17745746cfffd0287aa152b4b3e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or redirection tactic to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the malicious redirection URL.

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=baroque+architecture+pdf
- http://files.flyingbeauty.ch/uploads/1/3/1/0/131070202/7d5b3faed66c.pdf
- http://files.minasabritabrizi.com/uploads/1/3/2/7/132741429/f235f7328680f0f.pdf
- http://files.diamonddusterssoftball.com/uploads/1/3/0/9/130969809/7834564.pdf
- https://cdn.shopify.com/s/files/1/0431/8858/4605/files/65341018434.pdf
- https://cdn.shopify.com/s/files/1/0433/7768/8743/files/wivig.pdf
- https://cdn.shopify.com/s/files/1/0435/7432/9507/files/nofugofezumere.pdf
- https://cdn.shopify.com/s/files/1/0430/6921/0773/files/lasesejoxeme.pdf
- https://cdn.shopify.com/s/files/1/0434/6871/8242/files/58296561446.pdf
- https://cdn.shopify.com/s/files/1/0432/9019/8180/files/lawujo.pdf
- https://cdn.shopify.com/s/files/1/0430/5407/1957/files/gomejisusu.pdf
- https://cdn.shopify.com/s/files/1/0432/7243/7910/files/wupop.pdf
- https://cdn.shopify.com/s/files/1/0428/9950/5311/files/45727399901.pdf
- https://cdn.shopify.com/s/files/1/0430/9165/6864/files/70668781678.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_off00006e20.bin` `a45cc5b6a0f60e334569c0cafa42a3a52936880b0313d233e64ec8d04647d6b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E20	5208 bytes
`font_01_sfnt_off00007fd4.bin` `2925c1c6ba0f286175a9077acd391cd568f384017e807a61bf8520d4d54775df`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FD4	9916 bytes

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