Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df823835cb1334b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-10 21:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153a96295435c5748a9bd1bc9629dce5 SHA-1: e1fe6a932911639a23542c918d8d7cb3992ad10f SHA-256: 6df823835cb1334b2d7ab23d7521ddf0fa0531b3ead1e0f45d301c5e976d7adf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but redirect to a known malicious domain (ttraff.com). This technique is often used to distribute malware or phish for credentials. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users 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=mathematical+analysis+pdf+apostol
    • http://files.minnesota42.com/uploads/1/3/1/6/131636775/xebolopoxenuxug-pilusijugatu-pidodopir.pdf
    • http://files.movementandmeaning.com/uploads/1/3/0/7/130739011/gokitoxisevuvigenago.pdf
    • http://files.kristamasonyogafitness.com/uploads/1/3/1/3/131379439/tukozadisi.pdf
    • http://gilaj.mytinymooselodge.com/uploads/1/3/2/7/132740405/bozitexagejilibopuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/6031/0695/files/cancer_gastrico_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/vureputawegeka.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/vehicle_dynamics_theory_and_application_reza_n_jazar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/best_air_purifier_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/biophysics_searching_for_principles.pdf
    • https://cdn.shopify.com/s/files/1/0438/1320/8226/files/votebodabuzejumisaliz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/93536693121.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/dunaredinovaberaxajutawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/rijajufepov.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/99393017330.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/93764436303.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c5e.bin
a9131dc294e40bc511fe691fdef585f27bebde3a6457f83d18bdd4c4639a82d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5E 5408 bytes
font_01_sfnt_off00006eb1.bin
761f9027a58d3151bc18d69c6dd7fec3f64763ac00dc29ebfe06193eaf237b48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB1 10360 bytes

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