PDF malware analysis — malicious · 0fccfb51d3133f91

MALICIOUS

PDF

37.0 KB Created: 2020-08-25 04:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9f1f2c35e55b767138966cc76df6ebdf SHA-1: b9ef3f91308ae97e42eca0d3a292a87c5328b843 SHA-256: 0fccfb51d3133f91e978b7b3ed515c779dd4b15afb29e995a1d5636f44d1a813

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to direct users to malicious content. 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=bandiera+inglese+da+colorare+formato+a4
- http://files.cyclonecanvas.com/uploads/1/3/0/7/130739833/xegare.pdf
- http://juvovesol.evmpforum.com/uploads/1/3/2/6/132682090/445945.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/1284/8790/files/29621397564.pdf
- https://cdn.shopify.com/s/files/1/0429/0953/2316/files/nolarikavinaduteguf.pdf
- https://cdn.shopify.com/s/files/1/0430/0092/2261/files/25838514537.pdf
- https://cdn.shopify.com/s/files/1/0435/9726/7112/files/penyakit_anoreksia.pdf
- https://cdn.shopify.com/s/files/1/0429/8348/9690/files/firabiniwe.pdf
- https://cdn.shopify.com/s/files/1/0429/0792/6687/files/gravitational_force_worksheet_intro_to_phys_chem.pdf
- https://cdn.shopify.com/s/files/1/0431/7492/0347/files/doxixo.pdf
- https://cdn.shopify.com/s/files/1/0440/3062/3894/files/49946299620.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24803542318.pdf
- https://cdn.shopify.com/s/files/1/0427/9818/6652/files/pdf_to_word_online_candy.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005196.bin` `bbfd48fa485ea9f2e66e731e322939a02afa173cff9e92c08f2e4c1f558c43f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5196	5480 bytes
`font_01_sfnt_off0000641f.bin` `55f2c61298701668d992d53a219f0ff343f6a595b79d38ca328dbfaee01187e0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x641F	10860 bytes

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