PDF malware analysis — malicious · a93a7602fe84735b

MALICIOUS

PDF

47.1 KB Created: 2020-08-21 15:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cb3ef7764086b574bd39e9e975b2ae0a SHA-1: 94538447153c73e2afc36f8a57a9a9fa052354ac SHA-256: a93a7602fe84735b0d41afc691c4c42b9eee738c9f57f78a706c40ab167e18c4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, includes the same redirector URL, suggesting the primary intent is to lure the user to a malicious site via this link. No scripts were extracted from this sample.

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/pify?keyword=bending+emt+conduit+pdf
- http://files.hk.wall-in.com/uploads/1/3/0/7/130775357/2820215.pdf
- http://files.architecturaldesigner.world/uploads/1/3/1/3/131381901/806cb63b8820fe4.pdf
- https://cdn.shopify.com/s/files/1/0438/2602/0509/files/28113282540.pdf
- https://cdn.shopify.com/s/files/1/0429/1015/4908/files/12116563334.pdf
- https://cdn.shopify.com/s/files/1/0437/1942/6197/files/gaming_discord_servers.pdf
- https://cdn.shopify.com/s/files/1/0430/9975/0560/files/css_slide_down.pdf
- https://cdn.shopify.com/s/files/1/0457/3403/5622/files/blank_form_nafta_certificate_of_origin.pdf
- https://cdn.shopify.com/s/files/1/0432/3282/1412/files/31699647770.pdf
- https://cdn.shopify.com/s/files/1/0431/4251/2802/files/zowemelusekibonurizuxigul.pdf
- https://cdn.shopify.com/s/files/1/0435/3536/8346/files/53816149626.pdf
- https://cdn.shopify.com/s/files/1/0436/5503/7093/files/47383137344.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_off00006e48.bin` `7234e29cdf13eda1ec07f7d3e7319b83b3503e1f49f7d0e0305a7ff8dce98be5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E48	4888 bytes
`font_01_sfnt_off00007edd.bin` `7cbdcfa31eda1b9fe144564cc7121cda41bd25c0239f77053d415393b212ecf4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EDD	10260 bytes
`font_02_sfnt_off0000a1fb.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA1FB	4324 bytes

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