Malicious PDF — malware analysis report

Static analysis result for SHA-256 048fc28eb760df09…

MALICIOUS

PDF

33.3 KB Created: 2020-08-10 06:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52b306eca3c74c5cbd521125e8979b34 SHA-1: 01e7eefa3aa7dcdf31599136c76013369a841e41 SHA-256: 048fc28eb760df09c31309b71ca25d61e6152ea12c126669195917bb82d1fe56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector found in the heuristics. This suggests the primary goal is to direct users to malicious sites. No scripts were extracted, and the family is undetermined.

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=believer+imagine+dragons+sheet+music+free+pdf
    • http://files.dprservices513.com/uploads/1/3/2/3/132303229/xukiduzivebuno.pdf
    • http://files.dalemyersantiques.com/uploads/1/3/2/7/132711954/5137260.pdf
    • http://files.nimatennis.com.au/uploads/1/3/1/6/131606965/4116325.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/bimasonagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/stepwise_regression_spss.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/rapelurojokavujizabilulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/applescript_safari_print_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/14682398510.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/zifugukasugon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/xasakawavozufigezubeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/setejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/59155851387.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.

FilenameKindSourceSize
font_00_sfnt_off000044bf.bin
e8e7f7afbf45dad05802e26a7ab511bd63795c0c91dbfd9770152b180c0a60da
pdf-font-stream PDF embedded font (sfnt) at offset 0x44BF 5680 bytes
font_01_sfnt_off000057f2.bin
0bbc543df9413183c5669c4689501203d4594ca5de418ffc960384a6d090f0bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x57F2 9464 bytes