PDF malware analysis — malicious · 3747ed1291b8bb16

MALICIOUS

PDF

39.3 KB Created: 2020-08-30 02:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d35e2295c37db2b5d2d0b53f8936a37f SHA-1: 905bdde0bc29e43480f64c5f7b24e3882bd5fcd1 SHA-256: 3747ed1291b8bb160fb30673c5fdad9a73b461c0e4081ee6443241c8e02feaa4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=starcraft+field+manual+pdf'. The document body also contains this URL, suggesting it's intended to lure the user to malicious infrastructure. The presence of a large number of external PDF links, many pointing to Shopify domains, indicates a link farm SEO tactic, likely to obscure the malicious redirector.

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/wix?keyword=starcraft+field+manual+pdf
- https://static.usrfiles.com/ugd/b8c837_9cfa656bb47247d894b66cbc9449a514.pdf
- https://static.usrfiles.com/ugd/b8c837_78f7a6f0881a4487a911c0985caa0178.pdf
- https://static.usrfiles.com/ugd/ecec20_b406fde89eca429086e256a8dadf000b.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
- https://cdn.shopify.com/s/files/1/0432/8292/3676/files/microsoft_word_event_flyer_template_free.pdf
- https://cdn.shopify.com/s/files/1/0427/5837/3542/files/94868835505.pdf
- https://cdn.shopify.com/s/files/1/0433/1952/5534/files/tivopotimoxegutiforiv.pdf
- https://cdn.shopify.com/s/files/1/0427/8000/0423/files/vikejusil.pdf
- https://cdn.shopify.com/s/files/1/0433/5747/0874/files/chicco_bravo_for_2_manual.pdf
- https://cdn.shopify.com/s/files/1/0427/7485/5846/files/tizovidadovawikatof.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000500d.bin` `46e83c0167423b768be69e7107f4ec7c2990a63918df32803fae564d255dfed7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x500D	3396 bytes
`font_01_sfnt_off00005c1c.bin` `21957898ce1276f3cd816e6d86c68f8065499ee6a8d953d7331183547f19f9bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C1C	5228 bytes
`font_02_sfnt_off00006dc0.bin` `729c4b32407f9c00be85892121c31d9c037cf07b05e65f6ed27d1cc32cbdabc2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DC0	10092 bytes

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