PDF malware analysis — malicious · 9ac67d9fc3c63a0f

MALICIOUS

PDF

32.1 KB Created: 2020-08-20 02:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3097992ce766a873c9772c9c4df31e9a SHA-1: a8247fd4dad3fbceb18c65341f9e8009c7f7b056 SHA-256: 9ac67d9fc3c63a0fd89d367125d44d4844118d5d5323766bda2a63f84ad5ebb7

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector service. The document body also contains the same redirector URL and a large number of other URLs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=dilbert+the+knack+video
- http://tonije.mombabymelts.com/uploads/1/3/2/6/132681352/d1a8d516c2.pdf
- https://cdn.shopify.com/s/files/1/0433/9623/5415/files/catalyst_2960_switch_software_configuration_guide.pdf
- https://cdn.shopify.com/s/files/1/0434/5207/2086/files/.pdf
- https://cdn.shopify.com/s/files/1/0435/5201/4491/files/english_tagalog_dictionary_free_for_laptop.pdf
- https://cdn.shopify.com/s/files/1/0429/8414/5049/files/74078240533.pdf
- https://cdn.shopify.com/s/files/1/0433/6166/5192/files/911699249.pdf
- https://cdn.shopify.com/s/files/1/0433/6893/9672/files/ballroom_dance_waltz_music_free.pdf
- https://cdn.shopify.com/s/files/1/0427/7954/1671/files/texinono.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
- https://cdn.shopify.com/s/files/1/0430/1085/0979/files/56106024382.pdf
- https://cdn.shopify.com/s/files/1/0438/9906/0376/files/noromuzimopuwapavike.pdf
- https://cdn.shopify.com/s/files/1/0434/2457/9736/files/43757932039.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.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_off00004326.bin` `c1f6931838b6a87797da44fc221b702c37dcf9ee1e975043a17ecb7c01952372`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4326	5112 bytes
`font_01_sfnt_off00005474.bin` `05d54702ce712e2e16c6d5ee2f27886ec3609b35d16b5adfa22fcfb39ce5a735`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5474	9432 bytes

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