Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b270bf48614f759…

MALICIOUS

PDF

51.2 KB Created: 2020-09-12 23:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da01fc8a8652342c6d27dcb182ac49d8 SHA-1: 1cefe7621bd471a7802ecc2f7079d4a2b85bb37d SHA-256: 6b270bf48614f759a65d8e5c7a0ee3ebf22b662eafdbce3925c408a7038f731f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or link farms, indicating a phishing or SEO spam campaign. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.club/pify?keyword=google+translate+websites+iphone'. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the malicious intent.

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.club/pify?keyword=google+translate+websites+iphone
    • http://files.wearelkyoga.com/uploads/1/3/0/7/130738740/3255414.pdf
    • http://files.ssmercy.org/uploads/1/3/2/8/132814958/2a51c09.pdf
    • http://murifab.guidomuratorephoto.com/uploads/1/3/0/9/130969656/2464470.pdf
    • http://gotaveb.littleacornsharlow.com/uploads/1/3/1/8/131871699/jusepamo.pdf
    • http://darifudu.staty.org/uploads/1/3/1/6/131607254/tamijebidoz_jukasibowekofi_mimatexivepemak_zamovadesezi.pdf
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdf
    • http://files.petadzubiel.com/uploads/1/3/0/9/130969525/povidasiwedefez-jipidamabibip-jasudop.pdf
    • http://bajuvip.techniquejobs.com/uploads/1/3/1/0/131071157/512e46af375.pdf
    • http://files.postichewigs.com/uploads/1/3/1/3/131379111/lonakasef_vuperuf.pdf
    • http://tanipip.chipperchadbourne.com/uploads/1/3/0/7/130739046/f9228.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/5455/0440/files/ejercicios_con_numeros_romanos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/terraria_brain_of_cthulhu_expert_mode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0463/3634/4226/files/jakebojixamobubekara.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006650.bin
75a6e4e942ca0e4a9117cbfde04e9a3362f74c5fe0b30d80b5f31183eeecbc97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 5132 bytes
font_01_sfnt_off000077c8.bin
c816e2da198f8605c9c3ebc6dfb83ba2daef1b596a0723d11b68cc7311cbaa85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10288 bytes
font_02_sfnt_off00009b2f.bin
1b44218257806f750c7fedc2cca84b6b30ff477c2da870f9e14c0541087d9c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2F 16544 bytes
font_03_sfnt_off0000b172.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB172 4324 bytes

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