Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abaeecd3ec363de…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 17:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a6c84ef4920f1cb2161e23fd1d800b7 SHA-1: 28acb441abcadaf50c88b47b0b3fd3f37d2fa74e SHA-256: 8abaeecd3ec363de58ce1ff71b02d20d9a144b2653e698420fa44ecf20cd1614
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=hdfc+bank+education+loan+application+form+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Hdfc bank education loan application form pdf', suggesting a phishing lure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm designed 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.com/pify?keyword=hdfc+bank+education+loan+application+form+pdf
    • http://files.lh4biz.com/uploads/1/3/0/7/130739779/wefubinomuwexake.pdf
    • http://files.khairullahrahim.com/uploads/1/3/1/6/131606405/cf11bda2539d.pdf
    • http://files.tacomasbestpiercing.com/uploads/1/3/0/7/130776483/kelitozilu_xamupu_xagazipepavoji_rebefodoxapiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/67861010239.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/acls_ecg_rhythms.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/6235286544.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/xefusibajekajafazeguf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/manualidades_de_reciclaje_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/92547941538.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/kizemugifoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/tofiketuminuxosapenoxal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/gulewekejewasituzabowas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/tugubozexegozorovowurazun.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_off00006e1d.bin
4797418ec0aa1691aed4a7fba10e1dae724e2654f7d6ef204c03d156fd10e823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 5168 bytes
font_01_sfnt_off00007f91.bin
e66c04ea7a268ce2aa516412aca7d33cf5e1936555eeced6295b6e7ca0ab5abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F91 10252 bytes
font_02_sfnt_off0000a2a0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A0 4324 bytes

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