PDF malware analysis — malicious · 5b9827c74487082c

MALICIOUS

PDF

32.6 KB Created: 2020-08-19 03:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 87f4447c4fb52c46b648ae381ead01fd SHA-1: 349f226bb40f19bcc946b655593097791148a88c SHA-256: 5b9827c74487082c66149d156a1673568df365941cb1e011d0e042cfe21cfc65

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector. The embedded content suggests a lure related to 'Avast cleanup apk', likely intended to trick users into visiting the malicious URL. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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=avast+cleanup+apk
- http://files.girlytingz2.com/uploads/1/3/0/7/130738559/5463240.pdf
- http://files.sarahgray.info/uploads/1/3/0/8/130873855/fabolozumaxo.pdf
- http://files.steamdiscoverylab.com/uploads/1/3/0/9/130969637/nutenirobazo.pdf
- http://files.lostsalon.com/uploads/1/3/1/4/131454034/e1bc22384d3.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/6383/6834/files/sijenekuxirudarumukijud.pdf
- https://cdn.shopify.com/s/files/1/0430/0016/8597/files/19926166968.pdf
- https://cdn.shopify.com/s/files/1/0428/1496/3868/files/pipufazugagas.pdf
- https://cdn.shopify.com/s/files/1/0438/5760/8864/files/jolizawo.pdf
- https://cdn.shopify.com/s/files/1/0432/8439/8236/files/40183487261.pdf
- https://cdn.shopify.com/s/files/1/0431/8186/7176/files/motivasi_belajar_bahasa_inggris.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
- https://cdn.shopify.com/s/files/1/0432/4950/0315/files/jiruzofolelowagipiviz.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_off000044a2.bin` `0a7536e52f7e6124c3ece4312ea1cc3ca84183d425a798e5661b8beba1dad8a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44A2	4944 bytes
`font_01_sfnt_off00005588.bin` `6b492525be47f9f251cee61d6ba2da1b59984bd56a9276744d9a9621fc6bc1ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5588	9576 bytes

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