PDF malware analysis — malicious · 3c3332202de0e83e

MALICIOUS

PDF

47.5 KB Created: 2020-08-29 22:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: da8c75c4d562182571546ec67510bbf1 SHA-1: 21f5736b1ab9988a8b0e6becd645837137ff273d SHA-256: 3c3332202de0e83e9589cea2dac564338152598223862a337ea961979598106d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a link to a data science PDF. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to attract victims. The ML classifier also strongly flagged this PDF as malicious.

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=data+science+and+big+data+analytics+pdf
- https://cdn.shopify.com/s/files/1/0431/7410/1149/files/wemer.pdf
- https://cdn.shopify.com/s/files/1/0460/1230/1479/files/bally_sagoo_all_songs.pdf
- https://cdn.shopify.com/s/files/1/0432/0886/8008/files/14571204208.pdf
- https://static.usrfiles.com/ugd/b8c837_0dd0570dae5c4c2e9554067085331ac9.pdf
- https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
- https://cdn.shopify.com/s/files/1/0432/4396/2532/files/rivozipegibipizanudop.pdf
- https://cdn.shopify.com/s/files/1/0438/6953/6411/files/higher_engineering_mathematics_by_bv_ramana_download.pdf
- https://cdn.shopify.com/s/files/1/0434/5852/7397/files/ranenuzupatetotobevatazu.pdf
- https://static.usrfiles.com/ugd/12f4eb_13074820aa3b4e2bbc9a5ad603cb2022.pdf
- https://static.usrfiles.com/ugd/362633_0881520de8cc428b989e9c0dbd8faf2b.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_off00006c86.bin` `1498a4be1bcac769b8a1c2263a8a228d53ae2fa0e54469de3f7d8cba255a921c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C86	5144 bytes
`font_01_sfnt_off00007e19.bin` `bf26a6a19a69430433853df4c796c2a82cbc97c2a97015edb492ebcb78d15c80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E19	10748 bytes
`font_02_sfnt_off0000a2d0.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA2D0	4324 bytes

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