Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c28941115f0d21…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 22:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc2723665d58fbee66e453d1cbceff57 SHA-1: 4a3d7566aa00cd124815f5cd2895966f1a60a36b SHA-256: 92c28941115f0d21f590a89d84b1d57ff81d79a841bee8a28ce8e68e6cd61539
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure for 'Beginners guitar notes pdf'. The primary malicious URL, https://ttraff.cc/pify?keyword=beginners+guitar+notes+pdf, is used to redirect users to potentially harmful content, indicating a phishing or malware distribution attempt.

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.cc/pify?keyword=beginners+guitar+notes+pdf
    • http://files.butsavageracing.com/uploads/1/3/0/7/130776175/wivawopuvil.pdf
    • http://files.alliesadornments.com/uploads/1/3/0/7/130776875/mizezubaxeza.pdf
    • http://files.4therochesterraiders.org/uploads/1/3/1/6/131636772/7e51f2.pdf
    • http://files.hightides2.com/uploads/1/3/0/9/130969440/natigepewifel.pdf
    • http://files.blakerichterproductions.com/uploads/1/3/1/3/131383743/5169774.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/principles_of_agribusiness_management_fifth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/65556717729.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/tecnologias_de_la_informacion_y_comunicacion_en_salud.pdf
    • https://cdn.shopify.com/s/files/1/0434/8605/2504/files/25194476070.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/vorokitabatorexemagifeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/kapezoxuxulolavekuwuwed.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/fozosawor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/labajaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/sovaroruvuniporewoxatod.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/fekajemaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/98113451482.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a59.bin
09d2aa8a3e45752689c538e7b5630699f7d52548e26b869f1b18b2042c1c64ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 5224 bytes
font_01_sfnt_off00007c33.bin
6858068ed8fa0b906e5dd63764244684be9888a76013d472c4dba325648c08a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C33 10404 bytes

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