PDF malware analysis — malicious · 911c023ff0c8f34c

MALICIOUS

PDF

41.5 KB Created: 2020-09-03 01:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e3c118bf7eddd496195a30ab077a2ca1 SHA-1: 6412603129aaf6474854fbfbe666f257c304dc47 SHA-256: 911c023ff0c8f34c75f76feb0bbbe1f9ca193f6ac5da41d1d47c30675fa12b71

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with numerous embedded URLs, one of which, https://ttraff.me/wix?keyword=jasper+report+vs+ireport, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious URL, suggesting a lure to a phishing or malware delivery site.

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.me/wix?keyword=jasper+report+vs+ireport
- https://static.usrfiles.co
- https://cdn.shopify.com/s/files/1/0431/1384/0793/files/60263603628.pdf
- https://cdn.shopify.com/s/files/1/0433/1474/1413/files/madivekal.pdf
- https://cdn.shopify.com/s/files/1/0429/1834/6915/files/atmel_sam3x8e.pdf
- https://static.usrfiles.com/ugd/b8c837_43c840659fd2480593c52aa8e440cea8.pdf
- https://static.usrfiles.com/ugd/105a8c_b0672619f81b4253b74535b3e55f70f5.pdf
- https://static.usrfiles.com/ugd/f2ef67_d0f24e8a085947998d00c0bc3fc7ea39.pdf
- https://static.usrfiles.com/ugd/370b54_fc0a786e7f0c4d9395ce50776a3ec93c.pdf
- https://static.usrfiles.com/ugd/40512e_deb537acfa3e4b528a4a104cef0a1836.pdf
- https://cdn.shopify.com/s/files/1/0462/3371/4848/files/jefitajod.pdf
- https://cdn.shopify.com/s/files/1/0435/4460/8920/files/konuzerepukapiji.pdf
- https://static.usrfiles.com/ugd/cb2bed_00ed82e7b6c240a39a883e8cce0f8014.pdf
- https://static.usrfiles.com/ugd/edb4a7_08cf9235c76c4c3980cf47c97d9062d6.pdf
- https://static.usrfiles.com/ugd/b8c837_4b8b50b6c65d44b3a894d9dbbbea10e3.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_off0000671b.bin` `ae71b7292aecd8b63be7a0b6c77dd4cdd6edb7b6b2d86f641b43e37449ea6ca4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x671B	4828 bytes
`font_01_sfnt_off0000779e.bin` `6d32ce1084b534c49b0d3debf5dced24f2545d50ea3582e5b039f473e892f8e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x779E	9796 bytes

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