Malicious PDF — malware analysis report

Static analysis result for SHA-256 a448f45f7914ead8…

MALICIOUS

PDF

53.5 KB Created: 2020-09-10 07:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fa28a275eb64fd7be013e4c88999cb6 SHA-1: 2ae0ce7b6ea88da58e9908030482be39773a1886 SHA-256: a448f45f7914ead8b25e7f638ddbfe5f0a94185a47a7790f8a666c77ae049e8b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Hrsa biographical sketch template' and includes numerous URLs, suggesting a lure to a phishing or malware distribution site. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

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.me/pify?keyword=hrsa+biographical+sketch+template
    • http://files.euroasiaict.com/uploads/1/3/2/7/132740399/bonunat.pdf
    • http://gewokali.riverfrontroyale.com/uploads/1/3/1/3/131398367/timogatosaj_milosu_vazekupiviruro.pdf
    • http://xewexog.educationalpsychologisttherapy.com/uploads/1/3/0/8/130813364/9f0456e1a46d.pdf
    • http://tunopawek.iwantmyjacketback.com/uploads/1/3/1/3/131380128/xopitato.pdf
    • http://files.adamsfiredistrict.com/uploads/1/3/1/3/131384468/5537550bc97489.pdf
    • https://static.usrfiles.com/ugd/008e52_d0cd7cc0a15d456c83f80e8a96731367.pdf
    • https://static.usrfiles.com/ugd/89441e_f15c1f57e2a94bb59a74aa45e38ddac0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec98312f23d4465883f3d64519f1ab75.pdf
    • https://static.usrfiles.com/ugd/f4de5e_bc75c199c4634285bc0b9e07490a4e15.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/92160284491.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/basazagipelamipabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/xifufozotelovedofimujom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2094/2486/files/79333835584.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/82536810197.pdf
    • https://cdn.shopify.com/s/files/1/0448/0348/9954/files/the_bro_code_barney_stinson.pdf
    • https://cdn.shopify.com/s/files/1/0436/7872/8345/files/pojaxawe.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.

FilenameKindSourceSize
font_00_sfnt_off000091b8.bin
8b40e6db900eb0a57170ff5f561272fd734512baad00e4e4bfb5ff12e9d89e70
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B8 5512 bytes
font_01_sfnt_off0000a44d.bin
3176391df90fa740c3451daa76c4ff360d6a89a31e645f0d8bd3b46b02d34501
pdf-font-stream PDF embedded font (sfnt) at offset 0xA44D 10852 bytes