PDF malware analysis — malicious · 1d49ff0f2f8e6c5f

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 17:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 207937d6002ad38d7b2fb32e7b8713cc SHA-1: 34a0bea3fb5054ce332513ee6f7a6eca9f344f49 SHA-256: 1d49ff0f2f8e6c5f962e919e5533af62ba74099f909d925eb8d4c84f95e1c65b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as legitimate guides, but the primary link redirects to known malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs hosted on Shopify, likely to lend legitimacy to the lure.

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=climbing+rose+planting+guide
- http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
- http://xoxupex.ndeauction.org/uploads/1/3/1/6/131637814/5430570.pdf
- http://files.mangoconstruction.com/uploads/1/3/1/4/131437984/4441414.pdf
- http://files.fearlessgift.org/uploads/1/3/1/8/131872107/4069010.pdf
- https://cdn.shopify.com/s/files/1/0433/5131/0488/files/1549411192.pdf
- https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tegan.pdf
- https://cdn.shopify.com/s/files/1/0438/1445/3410/files/38174551668.pdf
- https://cdn.shopify.com/s/files/1/0433/6225/5013/files/murabamevotudupazegofo.pdf
- https://cdn.shopify.com/s/files/1/0440/6896/2469/files/mattress_dimension_guide.pdf
- https://cdn.shopify.com/s/files/1/0444/3986/3463/files/boiler_feed_water_treatment.pdf
- https://cdn.shopify.com/s/files/1/0432/8525/0216/files/maplestory_flames_guide.pdf
- https://cdn.shopify.com/s/files/1/0431/7567/4024/files/sejuxamudibumanulexupep.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.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_off00006551.bin` `ea413eb9e6903e13d29d9d6f24d36bb8c9a86c7b7601f5bc9d2782dd4355c894`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6551	5324 bytes
`font_01_sfnt_off0000773b.bin` `e4ca4744c093915108d15db49536e6be1256a53636a69ea4c0626d32ab107970`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x773B	10308 bytes

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