PDF malware analysis — malicious · a2eab388c5c97193

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 05:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0bcf55c4fa5026a53a09e64a4f3a4a80 SHA-1: 68fec0d526d9a63bfa3e1d54864999a3601c472f SHA-256: a2eab388c5c9719302abc5d74f16f64c9d9e6037a3903be1d9d3dc275a8785fb

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains text referencing a report and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated 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.com/pify?keyword=nepal+millennium+development+goals+progress+report+2015
- http://files.chinainblackandwhite.org/uploads/1/3/1/8/131872238/napetimuxisix.pdf
- http://kimad.dimplesanddirtbh.com/uploads/1/3/0/7/130738799/4a764b64a284.pdf
- http://files.churchonthehillglenavon.com/uploads/1/3/1/3/131382092/da3544e9b559.pdf
- https://cdn.shopify.com/s/files/1/0434/8100/6246/files/f12_mp4_chrome.pdf
- https://cdn.shopify.com/s/files/1/0439/4919/5419/files/34859778945.pdf
- https://cdn.shopify.com/s/files/1/0438/8444/5864/files/dogavodut.pdf
- https://cdn.shopify.com/s/files/1/0433/4272/5275/files/gotuvaluriximudabuvidano.pdf
- https://cdn.shopify.com/s/files/1/0438/8821/4171/files/clicker_heroes_2_save_editor.pdf
- https://cdn.shopify.com/s/files/1/0428/6650/7942/files/80142045941.pdf
- https://cdn.shopify.com/s/files/1/0428/4294/7750/files/kawuzolabulofenuvitawow.pdf
- https://cdn.shopify.com/s/files/1/0430/5115/5609/files/left_right_speaker_test.pdf
- https://cdn.shopify.com/s/files/1/0434/7074/9861/files/29676171114.pdf
- https://cdn.shopify.com/s/files/1/0431/4906/6397/files/oh_ms_believer_piano_sheet_music_free.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_off00005d7d.bin` `3cffde1e711b95ac1ef3f1d0ee78ee3b62c7afe3387dcd9746442f206845e7f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D7D	5756 bytes
`font_01_sfnt_off0000710b.bin` `17828e2983a3e91883ef387d9248576b45ead1b8defe556c8e657d5a0cd56db5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x710B	10528 bytes

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