Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93f8ae2dafaa64d…

MALICIOUS

PDF

55.7 KB Created: 2020-08-09 05:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4185670983e3740f7bc15742e3ae55a SHA-1: 3db0144204cf1ddd7ee35971fab96cbab4d480ae SHA-256: e93f8ae2dafaa64dc6943cca273074f3a76d11c872a712a15899f047aba0b1ca
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though partially corrupted, includes the same URL and keywords suggesting a lure for users to download a PDF. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports the malicious intent of distributing or redirecting to harmful content.

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=articles+of+faith+in+islam+pdf
    • http://files.her-diaries.com/uploads/1/3/2/8/132815343/vufumixemulu_sarimovawomija_tojuran.pdf
    • http://files.anrs.ca/uploads/1/3/2/6/132695278/7936766.pdf
    • http://files.huntsvillepsych.com/uploads/1/3/2/7/132712093/667508.pdf
    • http://files.laketrailnation.com/uploads/1/3/0/8/130815095/monuravolaxed.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/kexesovumameluwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/upsc_books_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/apostila_curso_de_ingles_basico.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/naxudujatolot.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1715/files/edwards_aquifer_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/waxoguxudukamutuwazilumas.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/35258436780.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/gixukelisudavepuzije.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/vebulugexezepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/computational_and_algorithmic_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/2005_volvo_s40_repair_manual.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_off000083ab.bin
1b1ad97d44a45d91df418b0930ffa2aafd25dd9084645c3e07238d22620145c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 5384 bytes
font_01_sfnt_off000095d1.bin
d56580858cbe476835e78c103e757148897d60411e5b9848bb7326237b8b561e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D1 10544 bytes
font_02_sfnt_off0000b993.bin
651f74d511a2115f9776378ad36e3c79e1606e03afc6b77aebf8908feac5c9c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB993 16956 bytes

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