Malicious PDF — malware analysis report

Static analysis result for SHA-256 77415b8a00459f51…

MALICIOUS

PDF

40.7 KB Created: 2020-09-01 00:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbc82eb76a30d6791206b2f601a78cc1 SHA-1: 7520c067eb8026135d877c6a89d742e62b522ff5 SHA-256: 77415b8a00459f512b4e42866f825b5da3b9cdf06c1d5fd88a99cc62d157091b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Albion online ios client' and the malicious URL itself, suggesting a lure to a fake download or scam. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of embedded links, many hosted on Shopify, likely to obscure the malicious redirector.

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.cc/wix?keyword=albion+online+ios+client
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/86376164660.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/lerivut.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/gosport_war_memorial_hospital_independent_report.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/angew_chem_communication_template.pdf
    • https://cdn.shopify.com/s/files/1/0463/2513/7563/files/make_it_right_piano_sheet_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/battlefield_4_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/gezekezodifedufajul.pdf
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/el_liberalismo_economico.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/fegifidaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/libro_rayner_quimica_inorganica.pdf
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/dushman_film_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/69899812118.pdf
    • https://static.usrfiles.com/ugd/20d83a_21f99c3db8d444f69dd0201499c0e6f4.pdf
    • https://static.usrfiles.com/ugd/9421c8_6571a0a801884453b45b4694f90f420a.pdf
    • https://static.usrfiles.com/ugd/f63f29_7657ae8c6d9345d0ac79f2369f4f5e71.pdf
    • https://static.usrfiles.com/ugd/7d21c0_f2b4d80fb80c4b04a79d4991920247cb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b06.bin
03045ce144d9e3090c81061313194bd009e6384b59733595e47fff05382b340d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B06 4616 bytes
font_01_sfnt_off00006acc.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACC 1800 bytes
font_02_sfnt_off0000735a.bin
0d480071bde067f75b6316b6f279895c597aaf221572c8c7bce6975167c48cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 10072 bytes

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