Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2fc4f71bc3b86e…

MALICIOUS

PDF

54.1 KB Created: 2020-08-10 06:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 893143eda32f256beb4bf58b523fc707 SHA-1: 4a652181acd9ce85e89a75f8cf2703c21211c6fa SHA-256: 5f2fc4f71bc3b86e54404a67176cc5f46ddadfe693dd24d05b8f0ec7723155cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is part of a larger scheme to generate traffic or distribute malicious files, with numerous external links. No scripts were extracted, but the embedded URLs and redirector link are the primary indicators of 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.ru/pify?keyword=general+knowledge+questions+and+answers+about+pakistan+in+english+pdf
    • http://files.aldenstidom.info/uploads/1/3/0/7/130776334/8162819.pdf
    • http://files.barrycolonfitnessrus.org/uploads/1/3/0/7/130740069/de936683814.pdf
    • http://pidunovi.poeticartspace.com/uploads/1/3/2/7/132712207/4789711.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/70950317703.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/recurring_credit_card_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/merasulalulizibekon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/timijesesafapojopixamapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/gadudepazamenuwabixavunop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/wutusoxuvigog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/32137219237.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/bekibidibonire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008447.bin
66105001f77fd29d35ba1e149cd3dba39779881381e305501a48fe1336c6e8c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 5640 bytes
font_01_sfnt_off00009777.bin
3f97b4a74d1b67ca7aa772c169e41d93d235fc46ded6d88f13447fed0ffd4e04
pdf-font-stream PDF embedded font (sfnt) at offset 0x9777 11360 bytes
font_02_sfnt_off0000bcdb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDB 4324 bytes