Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e90275a494a285…

MALICIOUS

PDF

46.4 KB Created: 2020-07-21 22:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99192cf6ca36fdf18803d91895aefedb SHA-1: be2857636b8bbf143fac503a6bc511eaa9df329d SHA-256: 13e90275a494a2856500abed91e8a464cb363d2092f1dbd9f507c9f6bee26260
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lead users to malicious content or phishing pages.

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=angulos+entre+rectas+paralelas+y+una+secante+pdf
    • http://files.singletree-emporium.com/uploads/1/3/0/7/130775982/1ca523.pdf
    • http://files.morningrosehouston.com/uploads/1/3/0/9/130969169/75961a.pdf
    • http://files.ambleandwarkworthrotary.org/uploads/1/3/1/8/131856285/bokivolifaruro-fipelu-tolenemosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/japexufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/40866738216.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/51976686288.pdf
    • https://loralamodi.files.wordpress.com/2020/06/bikoje.pdf
    • https://zinisarov424395058.files.wordpress.com/2020/07/zewukizapum.pdf
    • https://fetujinuzi.files.wordpress.com/2020/06/damebuxoxomavitezuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/pivetugidigatam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0643/files/timatoparilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3040/5535/files/zizatobilimigufesosezipas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/zoxidevejuxejuwenuxisama.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/fotelibopujazasifamewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/fisovojug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/11464424818.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/dobekoxufatafaginobale.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_off00007628.bin
2c4bf73f6ac968e279d09700618c86503c091433e89b4f2ae1c23bdd7f06ceed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7628 5248 bytes
font_01_sfnt_off0000881d.bin
35f043ddd46b9043aa74f9933537ca6de6296f26e443b2d0d39a55ac5bbfe222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x881D 10452 bytes

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